@BOOK {KANG:1992b, title = {Agroforesterie durable pour les tropiques; concepts et exemples: Guide de recherche de l'Iita, No. 26}, author = {Kang, B. T. }, series = {Guide de recherche de l'Iita, No. 26}, year = {1992}, month = {February}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {27p.}, }