"Electrification History to 1948". Pennsylvania Railroad Electrification. RailsAndTrails.com. Archived from the original on September 8, 2012. Retrieved August 25, 2007.
"February 2006 Meeting". National Railway Historical Society. Rivanna Chapter National Railway Historical Society. January 15, 2006. Archived from the original on September 30, 2007. Retrieved August 31, 2007.
"John B. Thayer (Obituary)". Railway Age Gazette. 52 (17). Chicago: Simmons-Boardman Publishing Co.: 979 April 26, 1912. Archived from the original on February 2, 2021. Retrieved November 18, 2020.
"Railway Signaling and Communications". Simmons-Boardman Publishing Corporation. April 10, 1934. Archived from the original on February 2, 2021. Retrieved February 13, 2020 – via Google Books.
Cushing, W. C. (May 12, 1905). "Progress in Yard Design". The Railroad Gazette. XXXVIII (19). New York: 480. Archived from the original on February 5, 2021. Retrieved September 6, 2019.
"Advance Planning Increases Efficiency of New Facility". Railway Age. 85 (16). East Stroudsburg, PA: Simmons-Boardman Publishing Company: 775. October 20, 1928. Archived from the original on February 2, 2021. Retrieved November 18, 2020 – via Google Books.
"American Premier Underwriters, Inc". International Directory of Company Histories, Vol. 10. St. James Press, 1995, reproduced by Funding Universe. Retrieved January 25, 2009.
Baer, Christopher T. (June 2004). "PRR Chronology 1915"(PDF). Pennsylvania Railroad Historical and Technical Society. Archived(PDF) from the original on October 30, 2020. Retrieved October 14, 2019.
"PRR Chronology 1871"(PDF). PRR Research. Philadelphia Chapter Pennsylvania Railroad Technical & Historical Society. January 2005. Archived from the original(PDF) on October 14, 2013. Retrieved August 27, 2007.
"PRR Signals". Pennsylvania Railroad Technical & Historical Society. Philadelphia Chapter Pennsylvania Railroad Technical & Historical Society. Archived from the original on March 9, 2007. Retrieved August 24, 2007.
Wallis; Crawford (November 27, 1916). Classification of Cars(PDF) (Report). Pennsylvania Railroad Company. p. 1. Archived(PDF) from the original on March 9, 2021. Retrieved October 12, 2019.
"Electrification History to 1948". Pennsylvania Railroad Electrification. RailsAndTrails.com. Archived from the original on September 8, 2012. Retrieved August 25, 2007.
In the years after the American Civil War, railroad leases were a common arrangement: a railroad contemplating an expansion, but reluctant to assume new risks or finance construction itself, would form a new railroad company or acquire a controlling interest in an existing company, lease the new railroad to itself (the "parent" railroad), and sell stock in the new corporation if necessary. The new line was frequently operated as if it was an integral part of the parent company. See John F. Meck, Jr., and John E. Masten, "Railroad Leases and Reorganization: IArchived 2019-04-27 at the Wayback Machine", Yale Law Journal 49:626-659, (1940) pp. 630-31.
"John B. Thayer (Obituary)". Railway Age Gazette. 52 (17). Chicago: Simmons-Boardman Publishing Co.: 979 April 26, 1912. Archived from the original on February 2, 2021. Retrieved November 18, 2020.
Baer, Christopher T. (June 2004). "PRR Chronology 1915"(PDF). Pennsylvania Railroad Historical and Technical Society. Archived(PDF) from the original on October 30, 2020. Retrieved October 14, 2019.
"PRR Chronology 1871"(PDF). PRR Research. Philadelphia Chapter Pennsylvania Railroad Technical & Historical Society. January 2005. Archived from the original(PDF) on October 14, 2013. Retrieved August 27, 2007.
"Railway Signaling and Communications". Simmons-Boardman Publishing Corporation. April 10, 1934. Archived from the original on February 2, 2021. Retrieved February 13, 2020 – via Google Books.
Wallis; Crawford (November 27, 1916). Classification of Cars(PDF) (Report). Pennsylvania Railroad Company. p. 1. Archived(PDF) from the original on March 9, 2021. Retrieved October 12, 2019.
"February 2006 Meeting". National Railway Historical Society. Rivanna Chapter National Railway Historical Society. January 15, 2006. Archived from the original on September 30, 2007. Retrieved August 31, 2007.
"Williams Grove Railroad". Williams Grove Historical Steam Engine Association – Williams Grove Railroad. Archived from the original on July 16, 2019. Retrieved September 7, 2019.
"PRR Signals". Pennsylvania Railroad Technical & Historical Society. Philadelphia Chapter Pennsylvania Railroad Technical & Historical Society. Archived from the original on March 9, 2007. Retrieved August 24, 2007.
Cushing, W. C. (May 12, 1905). "Progress in Yard Design". The Railroad Gazette. XXXVIII (19). New York: 480. Archived from the original on February 5, 2021. Retrieved September 6, 2019.
"Advance Planning Increases Efficiency of New Facility". Railway Age. 85 (16). East Stroudsburg, PA: Simmons-Boardman Publishing Company: 775. October 20, 1928. Archived from the original on February 2, 2021. Retrieved November 18, 2020 – via Google Books.
"Western Allegheny". Bessemer & Lake Erie Archives. Archived from the original on December 26, 2019. Retrieved December 26, 2019.
wgrailroad.com
"Williams Grove Railroad". Williams Grove Historical Steam Engine Association – Williams Grove Railroad. Archived from the original on July 16, 2019. Retrieved September 7, 2019.
In the years after the American Civil War, railroad leases were a common arrangement: a railroad contemplating an expansion, but reluctant to assume new risks or finance construction itself, would form a new railroad company or acquire a controlling interest in an existing company, lease the new railroad to itself (the "parent" railroad), and sell stock in the new corporation if necessary. The new line was frequently operated as if it was an integral part of the parent company. See John F. Meck, Jr., and John E. Masten, "Railroad Leases and Reorganization: IArchived 2019-04-27 at the Wayback Machine", Yale Law Journal 49:626-659, (1940) pp. 630-31.
