?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Keyfitz%2C+N.&rft.aulast=Keyfitz&rft.aufirst=N.&rft.issue=2&rft.volume=18&rft.date=1991&rft.issn=1927-629X&rft.atitle=Experiments+in+the+projection+of+mortality&rft.title=Canadian+Studies+in+Population&rft.pages=1-17&rft.genre=article