Author: Hilden, H.D. (editor).:
Title: Nordwestdeutsches Oberkarbon. Beiträge zur Lagerstättenerkundung des nordwestdeutschen Steinkohlengebirges. [Forschr. Geol. Rheinl. Westf., 23 & 33.]
Description: Krefeld. Large 8vo. Vol. 1: pp. 339, 26 pls., 34 tabs., 94 illus. in text, large fold. col. map and 4 (1 col.) fold. pls. of sections in pocket, refs.; vol. 2: pp. 323, 5 pls., 32 tabs., 93 illus. in text, 2 large fold. sheets of columnar sections in pocket, refs. Orig. cloth in dust-jacket. Fine set.

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