00864cam a22002291 4500 gs 06000395 DLC 20260227111303.0 811203s1906 dcuabf f000 0 eng c gs 06000395 U.S. Geol. survey. Library CarP DLC QE75 .B9 no. 269 TN936 .P92 Pratt, Joseph Hyde, 1870-1942. Corundum and its occurence and distribution in the United States (a rev. and enl. ed. of bulletin no. 180) by Joseph Hyde Pratt. Washington, Gov't print. off., 1906. 175, iii p. illus., xviii pl. (incl fold. maps) diagrs. 24 cm. U.S. Geological Survey. Bulletin no. 269 Issued also as House doc. no. 202, 59th Cong., 1st sess. Corundum. U.S. Geological Survey bulletin ; 269 24422 24422