?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=R&rft.au=Tabo%2C+R&rft.aulast=Tabo&rft.atitle=Participatory+Evaluation+of+Sorghum+Cultivars+in+Northern+Nigeria&rft.title=International+Sorghum+and+Millets+Newsletter&rft.date=1999&rft.volume=40&rft.pages=36-38&rft.genre=article