?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=J+N&rft.au=Daniel%2C+J+N&rft.aulast=Daniel&rft.atitle=Perennial+pigeonpea%3A+a+multi-purpose+species+for+agroforestry+systems&rft.title=Agroforestry+Systems&rft.issn=0167-4366&rft.date=1990&rft.volume=10&rft.pages=113-129&rft.issue=2&rft.genre=article