?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=H+C&rft.au=Sharma%2C+H+C&rft.aulast=Sharma&rft.atitle=Mechanisms+of+resistance+in+sorghum+to+head+bug%2C+Calocoris+angustatus&rft.title=Entomologia+Experimentalis+et+Applicata&rft.issn=1570-7458+&rft.date=1990&rft.volume=57&rft.pages=285-294&rft.issue=3&rft.genre=article