Tengnäs, Bo. creator text Nairobi, Kenya International Centre for Research in Agroforestry 1994 monographic xii, 177 p. : ill., map ; 30 cm. Bo Tengnäs. Includes bibliographical references (p. 173-177). S494.5 .A45T4 1994 9290591161 96980599 UOEL 000 20170824155523.0 111988