Den Biggelar, Christoffel. Farmer experimentation and innovation : a case study of knowledge generation processes in agroforestry systems in Rwanda / Christoffe l Den Biggelar. - Rome : FAO, 1996 - xi, 123p. : ill. ; 30 cm - Community forestry case study series ; 12 . Includes bibliographical references (p.116-120) Subjects--Topical Terms: Agroforestry-- Rwanda. Dewey Class. No.: 634.99