?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=R&rft.au=Ortiz%2C+R&rft.aulast=Ortiz&rft.atitle=Biotechnology+in+the+semi-arid+tropics+potential+for+improving+agricultural+production+through+biotechnology+in+the+semi-arid+tropics&rft.title=Thematic+Review+IV.2+World+Commission+on+Dams&rft.date=2000&rft.pages=1-29&rft.genre=article