Cowden, Dudley Johnstone,  1899- <br/><br/>
Measures of exports of the United States / 
by Dudley J.Cowden 
 - New York :  Columbia University Press,  c1931 
 - 123 p. ;  23 cm. 
 - Studies in history, economics and public law ;  No.356 .
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Index numbers (Economics)
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Commerce