TY  - BOOK
AU  - Gehlsen,Conrad August
TI  - World rubber production and trade: economic and technical aspects, 1935-1939,
T2  - International institute of agriculture. Studies of the principal agricultural products on the world market no
AV  - HD9000.5 .I6 no. 7
U1  - 338.1082 
PY  - 1940///
CY  - Rome
KW  - Rubber
KW  - Rubber industry and trade
N1  - "Publication consulted": p. 95-96
ER  -