Natrona, Pennsylvania (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Natrona, Pennsylvania" in English language version.

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5philageohistory.org

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3books.google.com

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2alleghenyludlum.com

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2pittsburghlive.com

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alleghenyludlum.com

"Process and Plant Capabilities—Brackenridge, PA". Retrieved February 18, 2009.
"Process and Plant Capabilities—Natrona, PA". Retrieved February 18, 2009.

archive.org

Sipes, William B. (1875). The Pennsylvania Railroad: Its Origin, Construction, Condition, and Connections; Embracing Historical, Descriptive, and Statistical Notices of Cities, Towns, Villages, Stations, Industries, and Objects of Interest on Its Various Lines in Pennsylvania and New Jersey. Pennsylvania Railroad Company. p. 218. Retrieved January 5, 2009. Pennsylvania Railroad natrona.

army.mil

lrp.usace.army.mil

"Lock and Dam 4". Archived from the original on January 9, 2009. Retrieved January 2, 2009.

books.google.com

"International Exhibition, 1876". 1876.
Eugene Gustav Eberle (1913). "The Student in Pharmacy: Embracing Theoretical and Practical". Southern Pharmaceutical Journal.
Roderick, James E. (April 1, 1914). "Report of the Department of Mines of Pennsylvania Part II---Bituminous 1913". Report of the Department of Mines of Pennsylvania. Wm. Stanley Ray, State Printer. p. 583. Retrieved February 18, 2009.

philageohistory.org

Hexamer, Ernest (October 30, 1873). "Map Collection, Free Library of Philadelphia". Hexamer General Surveys, Volume 8; Plate(s): 738-739-740. E. Hexamer & Son. Retrieved January 3, 2009.
Hexamer, Ernest (October 26, 1886). "Map Collection, Free Library of Philadelphia". Hexamer General Surveys, Volume 21; Plate(s): 2041-2042. E. Hexamer & Son. Retrieved January 3, 2009.
Hexamer, Ernest (October 26, 1886). "Map Collection, Free Library of Philadelphia". Hexamer General Surveys, Volume 21; Plate(s): 2043. E. Hexamer & Son. Retrieved January 3, 2009.
Hexamer, Ernest (August 26, 1893). "Map Collection, Free Library of Philadelphia". Hexamer General Surveys, Volume 28; Plate(s): 2693-2694. E. Hexamer & Son. Retrieved January 2, 2009.
Hexamer, Ernest (August 26, 1893). "Map Collection, Free Library of Philadelphia". Hexamer General Surveys, Volume 28; Plate(s): 2695. E. Hexamer & Son. Retrieved January 2, 2009.

pittsburghlive.com

Yerace, Tom (December 10, 2008). "Pollution around Highlands schools among worst in nation". Valley News Dispatch. Tribune-Review Publishing Company. Archived from the original on December 11, 2008. Retrieved January 2, 2009.
Krift, F.A. (April 28, 2008). "Boaters survive Allegheny River dam jump". Tribune-Review. Tribune-Review Publishing Company. Retrieved January 5, 2009.

triblive.com

Mary Ann Thomas. "Lower Burrell author delves into Natrona's past". Trib Total Media.

usgs.gov

geonames.usgs.gov

"Natrona". Geographic Names Information System. 2009. Retrieved December 2, 2009.

web.archive.org

"Lock and Dam 4". Archived from the original on January 9, 2009. Retrieved January 2, 2009.
Yerace, Tom (December 10, 2008). "Pollution around Highlands schools among worst in nation". Valley News Dispatch. Tribune-Review Publishing Company. Archived from the original on December 11, 2008. Retrieved January 2, 2009.