Pennsylvania Railroad class D6 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pennsylvania Railroad class D6" in English language version.

refsWebsite

Global rank English rank

low place

low place

70^th place

63^rd place

6^th place

6^th place

archive.org

Gunsaulus, Frank W. (ed.) (1906). Modern Engineering Practice. American School of Correspondence. {{cite book}}: |author= has generic name (help)

loc.gov

lccn.loc.gov

Staufer, Alvin F. & Pennypacker, Bert (1962). Pennsy Power: Steam and Electric Locomotives of the Pennsylvania Railroad, 1900–1957. Staufer. LCCN 62020878.

railfan.net

northeast.railfan.net

"PRR Steam Roster". Northeast Rails. Retrieved December 31, 2007.

prr.railfan.net

Pennsylvania Railroad. "D6 Diagram". PRR.Railfan.net. Retrieved December 31, 2007.