Kulp, Randolph L. (editor), with John P. Scharle (asst. editor) books & textbook
Railroads in the Lehigh River Valley
Kulp, Randolph L. (editor), with John P. Scharle (asst. editor)
National Railway Historical Society-Lehigh Valley Chapter /1962T Paperback
The Liberty Bell Route s 1000 Series Interurban Cars
Kulp, Randolph L. (editor); John P. Scharle and Howard P. Sell (asst. editors)
NAtional Railroad Historical Society /1964T Paperback
