?url_ver=Z39.88-2004&rft_id=0408&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Westermann&rft.aufirst=D.T.&rft.au=Westermann%2C+D.T.&rft.atitle=Symbiotic+N2(C2H2)+Fixation+by+Bean&rft.date=1978&rft.volume=18&rft.title=Crop+Science&rft.pages=986-990&rft.genre=article