Farming systems in the tropics
Ruthenberg, Hans.
Farming systems in the tropics by Hans Ruthenberg. - 2d ed. - Oxford Clarendon Press 1976. - 366 p.
0198594585
Agricultural systems
631.58 / (213) R974F
Farming systems in the tropics by Hans Ruthenberg. - 2d ed. - Oxford Clarendon Press 1976. - 366 p.
0198594585
Agricultural systems
631.58 / (213) R974F