1931 96 p., 15 figs, 27 pls (of which two are col. folded maps), roy. 4to, paperbound. Ex library Dr. J.H.F. Umbgrove. We added from the same expedition series: Steers, 1930. A Geographical Introduction to the Biological Reports (15 p., 4 figs, 2 pls).
1931 96 p., 27 pls (among which two large, folded col. maps), large 4to, hcloth (original front cover laid on). Ex library Dr. Max Weber (with his stamp).