5.
Pennsylvania Trolleys In Color Volume 2: The Philadelphia Region
by Volkmer, William D.
ISBN: 9781878887993
List Price: $49.95
6.
Pennsylvania Trolleys in Color, Vol. 1
by Volkmer, William D.
ISBN: 9781878887771
List Price: $49.95
7.
8.
9.
GE Chronicles An Employee's Look at Locomotive Production at the Erie Works
by William D Volkmer
ISBN: 9781582486246