1997-2006 (nos 32, 37, 42, 48, 53, 59, 60, 81, 83, 92).
1975 362 p., 32 plates, 97 distribution maps, paperbound. Thesis. Very good copy.Still the most important work on the land and freshwater molluscs of this isolated archipelago in the Eastern Atlantic. The clear descriptions and fine illustrations include many endemic species. This copy comes with the additional printed thesis description, with an identical size and cover (12, iii pp.), a loosely inserted printed list of “stellingen” (propositions), and a printed invitation card.