?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ringo%2C+J&rft.aufirst=J&rft.aulast=Ringo&rft.issn=1991-637X&rft.pages=2048-2060&rft.atitle=Combining+ability+of+some+sorghum+lines+for+dry+lands+and+sub-humid+environments+of+East+Africa&rft.volume=10&rft.issue=19&rft.title=African+Journal+of+Agricultural+Research&rft.date=May+2015&rft.genre=article