1981 74 p., 26 figs, 8 pls, 4to, paperbound.Published in: Zitteliana. We added: Hillebrandt, 1987. Liassic Ammonite Zones of South America and Correlations with Other Provinces. With description of new genera and species of Ammonites (47 p., 2 figs, 14 pls) + Hillebrandt & Westermann, 1985. Aalenian (Jurassic) Ammonite Faunas and Zones of the Southern Andes (34 p., 10 figs, 10 pls).