?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=K+L&rft.au=Sahrawat%2C+K+L&rft.aulast=Sahrawat&rft.isbn=0-85199-828-3+&rft.date=2005&rft.title=Measurable+biophysical+indicators+for+impact+assessment%3A+changes+in+water+availability+and+quality.&rft.tpages=382&rft.btitle=Natural+resource+management+in+agriculture%3A+methods+for+assessing+economic+and+environmental+impacts.&rft.genre=bookitem