00864cam a22002291  4500001001300000003000400013005001700017008004100034010001700075040004200092050002200134051001600156100003600172245013300208260004300341300006900384490004600453500006100499650001400560830004300574999001700617gs 06000395 DLC20260227111303.0811203s1906    dcuabf       f000 0 eng c  ags 06000395   aU.S. Geol. survey. LibrarycCarPdDLC00aQE75b.B9 no. 269  aTN936b.P921 aPratt, Joseph Hyde,d1870-1942.00aCorundum and its occurence and distribution in the United States (a rev. and enl. ed. of bulletin no. 180) by Joseph Hyde Pratt.  aWashington,bGov't print. off.,c1906.  a175, iii p.billus., xviii pl. (incl fold. maps) diagrs.c24 cm.1 aU.S. Geological Survey. Bulletinvno. 269  aIssued also as House doc. no. 202, 59th Cong., 1st sess. 0aCorundum. 0aU.S. Geological Survey bulletin ;v269  c24422d24422