TY - BOOK AU - Reijntjes,Coen AU - AU - Haverkort,Bertus TI - Farming for the future: an introduction to low-external-input and sustainable agriculture SN - 0333570111 PY - 1992/// CY - Leusden, Netherlands PB - ILEIA KW - Sustainable agriculture KW - Sustainable Agriculture KW - Research KW - Agricultural ecology KW - Organic farming ER -