- 1Dan Cupper
The Pennsylvania Turnpike : a history ; an authorized history by the Pennsylvania Turnpike Commission
Lebanon: Applied Arts Publishers 1995; III, 52 S. : Ill., Kt.
Straße; Pennsylvania; Geschichte - 2Mitchell E. Dakelman; Neal A. Schorr
The Pennsylvania Turnpike
Chicago (IL): Arcadia 2004; 128 S. : zahlr. Ill.
Straße; Pennsylvania; Bildband - 3Pennsylvania Turnpike Commission
A history of the Pennsylvania Turnpike
Harrisburg (PA): 1987; 16 S. : Ill.
Straßenbau; Pennsylvania; Geschichte - 4William H. Shank
Vanderbilt's folly : a history of the Pennsylvania turnpike
American Canal and Transportation Center 1973; 48 S. : Ill., Kt.
Straße; Pennsylvania; Geschichte - 5John N. Hoffman
Anthracite in the lehigh region of Pennsylvania, 1820 - 45
1968; S. 91 - 141 : Ill., graph. Darst., Kt.
Anthrazit; Pennsylvania; Bergbau; Geschichte 1820-1845 - 6J. G. Kohl
Reisen in Canada und durch die Staaten von New-York und Pennsylvanien
Stuttgart: Cotta'scher Verlag 1856; IV, 576 S.
Reisebericht 1856; New York <Staat>; Kanada; Pennsylvania - 7Andrew Cone; Walter R. Johns
Petrolia : A brief history of the Pennsylvania Petroleum Region, it's development, growth, resources, etc. from 1859 to 1869
New York (City): Appleton 1870; IV, 652 S. : Ill.
Pennsylvania; Erdöllagerstätte; Erdölindustrie; Geschichte 1859-1869