?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Wightman%2C+J+A&rft.aufirst=J+A&rft.aulast=Wightman&rft.issn=0167-8809&rft.pages=311-331&rft.atitle=An+insect%2C+agronomic+and+sociological+survey+of+groundnut+fields+in+southern+Africa&rft.volume=51&rft.issue=3&rft.title=Agriculture%2C+Ecosystems+and+Environment&rft.date=1994&rft.genre=article