1959 97 p., 14 folded plates, new half cloth with marbled boards.An important contribution with good photos of many new and poorly known Jurassic species. Added in photocopy is the 8 p. introduction to the paper by D. Jaboli, titled "Fossili giurassici dell'Harar (Africa Orientale): brachiopodi, lamellobranchi, gasteropodi", with some generalities on the faunas of which Venzo described the ammonites. A good copy.
1971 116 p., 12 figs, 18 pls, 2 folded, col. maps in rear pocket, paperbound. Library stamp. Atti Soc. It. Sci. Nat. Museo Civ. St. Nat. Milano.