?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=MacKellar%2C+F.L.&rft.aulast=MacKellar&rft.aufirst=F.L.&rft.issue=1&rft.volume=22&rft.date=March+1996&rft.issn=1728-4457&rft.atitle=On+human+carrying+capacity%3A+A+review+essay+on+Joel+Cohen's%3A+How+Many+People+Can+the+Earth+Support%3F&rft.title=Population+and+Development+Review&rft.pages=145-156&rft.genre=article