U.S. imports, 1972-1994 data and concordances
MLA
Feenstra, Robert C. U.s. Imports, 1972-1994: Data and Concordances. ASCII ed.
APA, 7th edition
Feenstra, R. C. U.S. imports, 1972-1994: data and concordances. ASCII ed.
Chicago, 17th edition
Feenstra, Robert C. U.S. imports, 1972-1994: data and concordances. ASCII ed.