00910oam 2200301z- 450 991082990170332120140918075329.00-89118-312-4(CKB)3810000000041792(EXLCZ)99381000000004179220210811c2015uuuu -u- -engOrganic farming the ecological system /Charles Francis, editorJohn Wiley & Sons, IncOrganic FarmingOrganic farmingCanadaOrganic farmingUnited StatesOrganic farmingOrganic farming631.5/84Francis Charles A.1940-1707003American Society of Agronomy.Crop Science Society of America.Soil Science Society of America.BOOK9910829901703321Organic farming4094888UNINA