?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=Breakdown+of+resistance+to+sorghum+midge%2C+Stenodiplosis+sorghicola&rft.title=Euphytica&rft.date=1999&rft.volume=109&rft.pages=131-140&rft.issue=2&rft.genre=article