Southern African Centre for Co-operation in Agricultural Research Southern African Development Community text Gaborone, Botswana Southern African Centre for Cooperation in Agricultural and Natural Resources Research and Training [1997] monographic xiii, 112, 8 p. : maps ; 25 cm. "January, 1997." "SADC." Includes bibliographical references. fs----- Agriculture Research Africa, Southern S589.7 R43 1997 630/.7/2068 00284030 UOEL 000 20170823123353.0 12213619