?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=R&rft.au=Mead%2C+R&rft.aulast=Mead&rft.atitle=The+concept+of+a+'land+equivalent+ratio'+and+advantages+in+yields+from+intercropping&rft.title=Experimental+Agriculture&rft.issn=0014-4797&rft.date=1980&rft.volume=16&rft.pages=217-228&rft.issue=3&rft.genre=article