?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=P+K&rft.au=Verma%2C+P+K&rft.aulast=Verma&rft.atitle=Physiological+and+biochemical+analysis+of+heterosis+in+sorghum&rft.title=Indian+Journal+of+Agricultural+Sciences&rft.issn=0019-5022&rft.date=1983&rft.volume=53&rft.pages=504-510&rft.issue=7&rft.genre=article