?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Chris&rft.aulast=Firth&rft.au=Firth%2C+Chris&rft.date=2006&rft.title=An+integrated+analysis+of+scale+effects+in+alternative+agricultural+systems&rft.genre=proceeding