Oszustowicz, Eric R. (August 2005). "NYC Subway Car Rosters and Assignments, 1960-71"(PDF). The Bulletin. 48 (8). Electric Railroaders' Association, Incorporated: 9. Archived(PDF) from the original on June 16, 2022. Retrieved June 16, 2022.
Alexander, Ivanoff (June 2019). "The R-42 at 50 Years: A Retrospective"(PDF). The Bulletin. 62 (6). Electric Railroaders' Association, Incorporated: 4. Archived(PDF) from the original on June 16, 2022. Retrieved June 16, 2022.
"R179 Staff Summary March 2012"(PDF). mta.info. New York City Transit. March 2012. Archived(PDF) from the original on November 7, 2016. Retrieved September 12, 2016.
new.mta.info
"Final Run of the R-42". new.mta.info. Metropolitan Transportation Authority. February 9, 2020. Archived from the original on February 9, 2020. Retrieved February 9, 2020.
Oszustowicz, Eric R. (August 2005). "NYC Subway Car Rosters and Assignments, 1960-71"(PDF). The Bulletin. 48 (8). Electric Railroaders' Association, Incorporated: 9. Archived(PDF) from the original on June 16, 2022. Retrieved June 16, 2022.
"R179 Staff Summary March 2012"(PDF). mta.info. New York City Transit. March 2012. Archived(PDF) from the original on November 7, 2016. Retrieved September 12, 2016.
Alexander, Ivanoff (June 2019). "The R-42 at 50 Years: A Retrospective"(PDF). The Bulletin. 62 (6). Electric Railroaders' Association, Incorporated: 4. Archived(PDF) from the original on June 16, 2022. Retrieved June 16, 2022.
"Final Run of the R-42". new.mta.info. Metropolitan Transportation Authority. February 9, 2020. Archived from the original on February 9, 2020. Retrieved February 9, 2020.