منحنى هورسشو (بنسيلفانيا) (Arabic Wikipedia)

Analysis of information sources in references of the Wikipedia article "منحنى هورسشو (بنسيلفانيا)" in Arabic language version.

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1st place
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4,453rd place
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23rd place

altoonamirror.com

amtrak.com

  • "Pennsylvanian" (PDF). Amtrak. 12 يناير 2015. مؤرشف من الأصل (PDF) في 2015-02-26. اطلع عليه بتاريخ 2015-02-01.

archive.org

multimodalways.org

  • Engineering Design and Construction (2012). Pittsburgh Division (PDF). Track Charts. Atlanta, Georgia: Norfolk Southern Railway. ص. 026. مؤرشف من الأصل (PDF) في 2017-07-04. اطلع عليه بتاريخ 2015-02-01.

news.google.com

nps.gov

nrhp.focus.nps.gov

  • "National Register Information System". National Register of Historic Places. إدارة المتنزهات الوطنية. 9 يوليو 2010.
  • "NPS Focus". National Register of Historic Places. إدارة المتنزهات الوطنية. مؤرشف من الأصل في 2008-07-25. اطلع عليه بتاريخ 2013-06-05.

nps.gov

nscorp.com

nytimes.com

psu.edu

pabook.libraries.psu.edu

state.pa.us

legis.state.pa.us

web.archive.org