Participation of United States flag ships in American overseas trade, 1921-1951
By: prepared by [Roger A. Vaughan and Irwin M. Heine of the] Division of Ship Statistics, Office of Subsidy and Government Aid.
Publisher: U.S. Govt. Print. Off.]
Published: 1952
Place of publication: [Washington
Language: eng
Subjects: Merchant marine -- United States.
Notes: Cover title.