00839cam a22002651 4500 gs 52000264 DLC 20260227111359.0 790424s1952 ndub b s000 0 eng c gs 52000264 (OCoLC)4888875 U.S. Geol. Survey. Libr. MnMohC DLC premarc n-us-nd QE149 .T6 557.84 Towse, Donald Frederick. Subsurface geology of south-central North Dakota. Grand Forks, 1952. 23 p. 2 maps, 2 diagrs. 23 cm. North Dakota Geological Survey. Bulletin 27 "Reprinted in part from Proceedings of the North Dakota Academy of Science, vol. VI, pp. 26-34, 1952." Bibliography: p. 11. Geology North Dakota. 28681 28681