?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+II.+comparison+of+three+random+sampling+strategies&rft.title=Crop+Science&rft.date=2001&rft.volume=41&rft.pages=241-246&rft.issue=1&rft.genre=article