Winkler, A. (ed.) — Catalogus coleopterorum regionis palaearcticae.

1924-1932 In two volumes (complete). Double title pages, viii, 1698 p., in 13 issues as published, all with original printed covers. Three back covers detached, some wear on spines, else good. The basis for every palaearctic Coleoptera-study, listing nearly 9,000 numbered species, not counting the varieties, which are indicated by letters. This is the special "annotation-copy". In this copy, the pages are deliberately half blank, to create room for annotations. This copy, however, has no annotations. Another edition exists, in which the text is printed in two columns without blanks. Such reference copies are only half as thick.