@BOOK {SCHULZ:2001a, title = {Participation des agriculteurs a la recherche et au developpement; techniques de recensement at de resolution de problemes: Guide de recherche de l'Iita, No. 57}, author = {Schulz, S. }, series = {Guide de recherche de l'Iita, No. 57}, year = {2001}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, isbn = {978-131-188-6}, note = {25p.}, }