This book tracks all the Fundensions of the modern era. Info on that era is tough to come by, but this book helped to fill in the gaps.
INCLUDES:
Diesels, Electrics, and motorized units
Steam engines
Hopper cars
Box, refrigerator and stock cars
Cabooses
Accessories
Gondolas
Tank and vat cars
Flatcars
Passenger cars
Operating cars
Automobile Carriers
Factory Errors and Prototypes
Sets
Trucks and Boxes