1889-1914 With 5 lithographed plates of which 2 hand-coloured, disbound (partly loose, no covers). Published in: Notes from the Leyden Museum. Almost all papers are or include new species descriptions. Many are smaller papers with only 1-4 pages. Includes one related paper by Ant. Grouvelle. This is the large majority of what Ritsema published in the Notes from the Leyden Museum (netherlands).
1878 34 p., 2 partly col. pls, disbound (no covers). Published in: Tijdschrift voor Entomologie.
MULDER, F.J. de - Mark GELUK - Ipo RITSEMA - Wim WESTERHOFF - Theo WONG :
Reference : 54967
Delft, TNO, 2003, in-8°, 376 pp. harback met orignele stofwikkel.