General imports :  world area by commodity groupings : US foreign trade 

 - Washington :  U.S. Bureau of the Census ,  1970 
 - x, 457 p. ;  28 cm. 
 - United States  Bureau of the Census.;  FT 155. .
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Commerce.
<br/><br/><label>Dewey Class. No.: </label>338.910973