01502cam a22003371a 4500 gs 32000012 DLC 20260227111336.0 790517s1931 ne abf b 001 0 eng c gs 32000012 (OCoLC)4977419 U.S. Geol. Survey Libr. NIC DNAL DLC Q57 .A533 deel 27, no. 3 QE671 .W37 Q57.V47 d.27 no.3 X400 551.43 Waterschoot van der Gracht, W. A. J. M. van (Willem Anton Joseph Maria), 1873-1943. The Permo-Carboniferous orogeny in the south-central United States / by W.A.J.M. van Waterschoot van der Gracht. Amsterdam : Noord-Hollandsche Uitg. Mij., 1931. 170 p., [12] leaves of plates (some folded) : ill., maps ; 27 cm. Verhandelingen der Koninklijke Akademie van Wetenschappen te Amsterdam, Afdeeling Natuurkunde. Tweede sectie ; d. 27 no. 3 Part of illustrative matter folded in pocket. Presented at the meeting of the Royal Academy of Sciences in Amsterdam in Feb. 1930. Also read before the American Association of Petroleum Geologists at the New Orleans meeting in Mar. 1930. Bibliography: p. [157]-162. Includes index. Mountains United States. Ouachita Mountains (Ark. and Okla.) Wichita Mountains (Okla.) Geology, Stratigraphic Carboniferous. 26929 26929