?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=C&rft.au=Grenier%2C+C&rft.aulast=Grenier&rft.atitle=Core+collection+of+sorghum%3A+I.+stratification+based+on+eco-geographical+data&rft.title=Crop+Science&rft.date=2001&rft.volume=41&rft.pages=234-240&rft.issue=1&rft.genre=article