Pennsylvania Railroad GG-1 Project Reference 


The Remarkable GG-1

Karl R. Zimmermann

Quadrant Press, Incorporated

©1977

ISBN #0-915276-16-X

 

Pennsy Power

Alvin F. Staufer

©1962

Library of Congress No. 62-20878

 

Pennsy Power II

Alvin F. Staufer

©1968

Library of Congress No. 62-20872

 

Pennsy Power III

Alvin F. Staufer

©1993

ISBN #0-944513-10-7

 


 

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