@BOOK {KONAN:1995, title = {Initiation aux methodes d'enquetes procedures d'enouetes par questionnaires: Guide de recherche et de formation IDESSA, Prt 13}, author = {Konan, K. B. }, series = {Guide de recherche et de formation IDESSA, Prt 13}, year = {1995}, month = {June}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {44p.}, }