Most Popular Books
- Malacologische Untersuchungen Volume T 4
- Scientific results of the exploration of Alaska by the parties under the charge of W.H. Dall, during the years 1865-1874. On the nudibranchiate ... reference to those of Alaska : second part
- Reisen im Archipel der Philippinen, Wissenschaftliche Resultate Neunter Band
- On Bergh's Malacologische Untersuchungen
