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BL1803D. The Geology of Val Verde County, by J. R. Roberts and J. P. Nash. 51 p., 1 map, 4 plates, 1918. Downloadable PDF. To purchase this publication in book format, please order BL1803.
Keywords: Texas, Val Verde County
Roberts, J. R., and Nash, J. P., 1918,The Geology of Val Verde County: University of Texas, Austin, Bureau of Economic Geology and Technology, Bulletin 1803, 51 p.