GG1 Reference Sources

• Pennsy Power
  Alvin F. Staufer
  The Standard Printing & Publishing Co.; Carrollton, OH; ©1962
  LOCN: 62-20878
  

• Pennsy Power II
  Alvin F. Staufer and Bert Pennypacker
  Stauffer Litho Plate Co.; 218 E. Washington St.; Medina, OH; ©1968
  LOCN: 62-20872
  

• Pennsy Electric Years
  William D. Volkmer
  Morning Sun Books
  

• The Remarkable GG1
  Karl Zimmermann
  Quadrant Press Review 6, Quadrant Press, New York, NY; ©1977
  ISBN: 0-915276-16-X
  

• Electric Traction on the Pennsylvania Railroad, 1895-1968
  Michael Bezilla
  The Pennsylvania State University Press, 1980
  

• Career of a Champion: The Story of 'Old Rivets' 4800
  Frederic Abendschein and Dan Cupper
  1984
  Lancaster Chapter of the NRHS
  342 W. Fritz Avenue
  Quarryville PA 17566
  Notes: 3 Color and 75 Black/ White Pictures; 56 Pages; Paperback