1953 58 p., 3 figs, 4 pls, 29 tables, paperbound. Published in: Verh. Kon. Ned. Akademie Wetenschappen. I included 6 smaller papers by Van der Vlerk. From the library of Dr. H. Dighton Thomas, with author's dedication.This collection belonged to the former Wheldon & Wesley stock which was bought in 2005. See my webste www.strackbooks.nl under the section news for more information and photographs on this extraordinary acquisition.
1950 [6], 287 p., 98 figs, 40 pls, cloth. Good copy.