C&O's H-6 Twin Hopper
Railroad Model Craftsman 1978-05
Freight Cars - Hoppers
This brief article describes the car, and includes lots of prototype photos, and scaled drawings.
Railroad Model Craftsman 1976-11
Freight Cars - Flat Cars
Photos and scale drawings for Western Maryland 6010-11, C&O 80996-80999, and NYC 499086.