?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=B&rft.au=Shiferaw%2C+B&rft.aulast=Shiferaw&rft.isbn=0-85199-828-3&rft.date=2005&rft.title=Assessing+the+economic+and+environmental+impacts+of+conservation+technologies%3A+a+farm-level+bioeconomic+modelling+approach&rft.tpages=382&rft.btitle=Natural+resource+management+in+agriculture%3A+methods+for+assessing+economic+and+environmental+impacts&rft.genre=bookitem