?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Bown%2C+P&rft.aufirst=P&rft.aulast=Bown&rft.date=1990&rft.atitle=The+occurrence+of+calcareous+nannofossils+in+the+Triassic%2FJurassic+boundary+interval&rft.volume=3&rft.pages=127-136&rft.title=Les+Cahiers+de+l'Universit%C3%A9+Catholique+de+Lyon&rft.genre=article