?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=H+G+P&rft.au=Jansen%2C+H+G+P&rft.aulast=Jansen&rft.atitle=Adoption+Ceilings+and+Modern+Coarse+Cereal+Cultivars+in+India&rft.title=American+Journal+of+Agricultural+Economics&rft.issn=0002-9092+&rft.date=1990&rft.volume=72&rft.pages=653-663&rft.issue=3&rft.genre=article