?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Williams%2C+J+H&rft.aufirst=J+H&rft.aulast=Williams&rft.date=1992&rft.title=Concepts+for+the+application+of+crop+physiological+models+to+crop+breeding&rft.genre=proceeding