00957cam a22002651 4500 gs 47000068 DLC 20260227111352.0 780809s1946 nmua 000 0 eng gs 47000068 (OCoLC)4123794 DLC TxEU CoD DLC premarc TN24.N6 A232 no. 21 Rothrock, Howard Eugene, 1895- Fluorspar resources of New Mexico, by Howard E. Rothrock, C. H. Johnson, and A. D. Hahn. Socorro, 1946. 245 p. illus., diagrs (part fold. part in pocket) 23 cm. New Mexico. Bureau of Mines and Mineral Resources. Bulletin 21 "Prepared chiefly by the Geological Survey and the Bureau of Mines, U. S. Department of the Interior." Bibliography: p. 191-193. Fluorspar. Johnson, Charles Harvey, 1898- Hahn, Abner Decker, 1898- 28136 28136