?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=P+R&rft.au=Lawrence%2C+P+R&rft.aulast=Lawrence&rft.atitle=Design+and+Testing+of+a+Global+Positioning+System-Based+Radiometer+for+Precision+Mapping+of+Pearl+Millet+Total+Dry+Matter+in+the+Sahel&rft.title=Agronomy+Journal&rft.issn=1435-0645&rft.date=2000&rft.volume=92&rft.pages=1086-1095&rft.issue=6&rft.genre=article