Ruthenberg, Hans Farming systems in the tropics / Hans Ruthenberg, with contributions by J. D. MacArthur, H. D. Zandstra, and M. P. Collinson - xxii, 424 p. : il. ; 24 cm. Incluye referencia bibliográfica: p. [397]-414 e índice ISBN: 0198594828 (pbk.) Subjects--Topical Terms: ADMINISTRACION AGRICOLASISTEMAS AGRICOLAS Dewey Class. No.: 630.913 / Ru87f