World rubber production and trade economic and technical aspects, 1935-1939 Gehlsen, Conrad August 1889- creator text it Rome 1940 monographic eng
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2 p. l., [vii]-xv, 191, [1] p. incl. 6 maps. 24 cm. by C.A. Gehlsen. "Publication consulted": p. 95-96. Rubber Rubber industry and trade HD9000.5 .I6 no. 7 338.1082 International institute of agriculture. Studies of the principal agricultural products on the world market no. 7 agr42000203 U.S. Dept. of Agr. Library 850611 20260227111000.0 agr42000203