1.
EMD's GP18: The Transitional Road Switcher - Warren L. Calloway - Paperback - 1st ed
by Calloway, Warren L., Wither...
ISBN: 9781881411017
List Price: $9.95
2.
Gp20 and Sd24: EMD's Turbocharged Duo - Paul K. Withers - Hardcover
by Withers, Paul K., Calloway,...
ISBN: 9781881411192
List Price: $29.95