The cultivated plants of the tropics and subtropics : cultivation, economic value, utilization / Rehm, Sigmund Espig, Gustav Tropical crops 633 MAR 1991 A090 Co. Translation of Die Kulturpflanzen der Tropen und Subtropen Weikersheim, West Germany : Margraf, 1991 1991 Text viii, 552 p. : ger