General imports into the United States by air.
Part 1,
Commodity by country of origin.

APA Citation

United States. Bureau of the Census. Foreign Trade Division. (1945). General imports into the United States by air. [Washington, D.C.]: Dept. of Commerce, Bureau of the Census.

MLA Citation

United States. Bureau of the Census. Foreign Trade Division. General Imports Into the United States by Air. [Washington, D.C.]: Dept. of Commerce, Bureau of the Census, 1945.

Warning: These citations may not always be complete (especially for serials).