1932 204 p., 223 figs, new red cloth. Ex libris Rudolf Troelstra.
1932 204 p., 223 figs, new black cloth with paper label on spine (original printed front cover laid on). Library stamps, else good copy.
1932-1940 Two parts in one. 204, 166 p., 34, 5, 92, 31, 4, 57, 338 figures, new half cloth, gilt title on spine. Library stamps, else good set.