Cephalopods - present and past : [the proceedings volume is the result of the 5th International Symposium "Cephalopods - Present and Past" held in Vienna (Austria) on the occasion of the 150th anniversary of the Geological Survey of Austria (Geologische Bundesanstalt Wien from 6th - 9th September 1999] [3-85316-014-X] Summesberger, Herbert