1999 vii, 252 p., 133 figs, 24 tables, paperbound. Crisp new copy.
1915 110 p., 3 pls (of which two are maps), paperbound (spine worn, covers loose). Published in: Proceedings of the Royal Irish Academy.
1911 vi, 162 p., 65 figs, 2 (1 col.) pls, publisher's cloth. Ex library G. Postma (with his signature) and Dr. W. Vervoort (with his ex libris / bookplate).
1925 168 p., 53 figs, roy. 4to, new black cloth (original printed front cover laid on). Ex library Dr. P. Wagenaar Hummelinck (with his signature and ex libris/bookplate). Scarce.
1919-1923 2 volumes (complete). 188, 242 p.,56, 35 figs, cloth (original printed front covers laid on). Zoologische Jahrbücher, Abteilung für Systematik, Geographie und Biologie der Tiere. Ex library Dr. P. Wagenaar Hummelinck (with his signature and ex libris / bookplate).
1911 60 p., 3 figs, paperbound. Published in: Revue Suisse de Zoologie. Good unopened copy. Ex library Station Aquicole Grimaldi, Faculté des Sciences de Dijon (with their stamp).
1999 179 p., num. figs, paperbound. Zoosystematica Rossica Supplement No. 1.
1941 26 p., 52 pls, roy. 4to, hcloth (original front cover laid on). Library stamps. Discovery Reports.
1935 ie Gorgonacea der Siboga-Expedition. Supplement I. Revision der Plexauridae. vi, 106 p., 27 figs, 7 pls, roy. 4to, contemporary boards (with original printed front cover laid on). Number and perforations stamp on title-page. With author’s dedication.
1934 67 p., 11 figs, 2 pls, roy. 4to, hcloth boards (original front cover laid on). Discovery Reports. Library stamps (Zoologisch Museum Amsterdam).
1942 74 p., 17 figs, paperbound. Published in: Zoologischer Jahrbücher. We added two more reprints of papers on freshwater Nemerteans by Stiasny-Wijnhoff.
1936 [4], 78 p., 11 figs, 38 pls (mostly heliotypes, but also 2 col. lithographs), roy. 4to, hcloth (some wear, no label on spine). Library stamps (Naturalis, Leiden - discarded) and other library markings. Ex library Dr. J.M. van der Vlerk (with his signature).
1996 vii, 200 p., 45 figs, 23 pls, paperbound. Published in: Berichte zur Polarforschung / Reports on Polar Research.
1948-1958 Vol. 83 (1946) - 85 (1948), 87 (1950), 89 (1952) - 90 (1953) & 93 (1956). In all 7 issues/volumes (183 p.) in original printed wrappers.
1971 xxxv, 584 p., num figs, cloth (dust jacket. Good copy.
1978 xv, 581 p., num. figs, hardbound. Library stamps and markings. Monographs on oceanographic methodology .
1948 59 p., 13 figs, 12 maps, paperbound (disbound, no covers). Published in: Bergens Museums Arbok.
1948 59 p., 13 figs, 12 maps, paperbound. Published in: Bergens Museums Arbok.
1948 58 p., 18 figs, paperbound (printed covers). Published in: Tromso Museum Arshefter.
1913 112 p., 8 figs, 3 folded (1 partly col.) pls, disbound. Unopened copy. Published in: Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Scarce.
1979 114 p., 17 figs, 9 pls, paperbound. Zoologische Verhandelingen.
1905 59 p., 7 pls, paperbound (printed covers). Lower right corner waterstained. In Russian with German abstract (including complete species descriptions!). Scarce
1904 52 p., 9 figs, paperbound (printed covers). Thesis. With author's dedication to Dr. Y. Delage. Scarce
1920 286, [2] p., 174 figs, 1 double-paged plate, roy. 4to, paperbound. Library stamps. Thesis.
Paris, CNRS 2000 In-8 broché 24 cm sur 17. 588 pages. .
Index systématique, table des matières.