Gehlsen, Conrad August,  1889- <br/><br/>
World rubber production and trade;  economic and technical aspects, 1935-1939, 
by C.A. Gehlsen. 
 - Rome,  1940. 
 - 2 p. l., [vii]-xv, 191, [1] p. incl. 6 maps.  24 cm. 
 - International institute of agriculture. Studies of the principal agricultural products on the world market no.  7 .
<br/><br/>"Publication consulted": p. 95-96. 
<br/><br/><label>LCCN: </label>agr42000203  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rubber.<br/>Rubber industry and trade.
<br/><br/><label>LC Class. No.: </label>HD9000.5  / .I6 no. 7 
<br/><br/><label>Dewey Class. No.: </label>338.1082