United States. Interstate Commerce Commission. (1940). Freight Train Performance of Class I Steam Railways in the United States, June 1940. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Interstate Commerce Commission. Freight Train Performance of Class I Steam Railways in the United States, June 1940. [Washington]: [publisher not identified], 1940.
MLA (8th ed.) CitationUnited States. Interstate Commerce Commission. Freight Train Performance of Class I Steam Railways in the United States, June 1940. [publisher not identified], 1940.
Warning: These citations may not always be 100% accurate.