@BOOK {CLAASSEN:1995b, title = {Les semoirs dans les fermes agricoles experimentales: Guide de recherche de l'Iita, No. 13}, author = {Claassen, S. L. }, series = {Guide de recherche de l'Iita, No. 13}, year = {1995}, month = {March}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {34p.}, }