TY - BOOK AU - Re˜ntjes,Coen AU - Haverkort,Bertus AU - Waters-Bayer,Ann TI - Farming for the future: an introduction to low-external input and sustainable agriculture PY - 1992/// CY - Leusden PB - Macmillan, Information centre for low-external-input and sustainable agriculture-ILEIA KW - Agronomie KW - Ecologie KW - Développement ER -