?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=S+N&rft.au=Nigam%2C+S+N&rft.aulast=Nigam&rft.atitle=Utilization+of+Natural+Hybrids+in+the+Improvement+of+Groundnuts+(Arachis+hypogaea)&rft.title=Experimental+Agriculture&rft.issn=1469-4441&rft.date=1983&rft.volume=19&rft.pages=355-359&rft.issue=4&rft.genre=article