Media type: E-Article Title: Indicators: Tools to Evaluate the Environmental Impacts of Farming Systems Contributor: Girardin, Philippe; Bockstaller, Christian; Werf, Hayo Van der imprint: Informa UK Limited, 1999 Published in: Journal of Sustainable Agriculture Language: English DOI: 10.1300/j064v13n04_03 ISSN: 1044-0046; 1540-7578 Origination: Footnote: