Crumbaker, C. (1940). Transportation and politics: As study of long-and-short-haul policies of Congress and the Interstate commerce commission. University of Oregon.
Dyfyniad Arddull ChicagoCrumbaker, Calvin. Transportation and Politics: As Study of Long-and-short-haul Policies of Congress and the Interstate Commerce Commission. Eugene: University of Oregon, 1940.
Dyfyniad MLACrumbaker, Calvin. Transportation and Politics: As Study of Long-and-short-haul Policies of Congress and the Interstate Commerce Commission. University of Oregon, 1940.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.