01019cam a22002891  4500001001300000003000400013005001700017008004100034010001700075035001900092040004900111042001200160050001700172082001600189086002800205100003800233245011500271260002600386300001800412490009300430500005800523500001700581504003900598650001500637700006000652999001700712gs 21000322 DLC20260227111325.0770720s1921    azu           000 0 eng c  ags 21000322   a(OCoLC)3128435  aU.S. Geol. Survey. LibrarycTxEUdOCoLCdDLC  apremarc00aTN948.F6bA4  a402(274)Ar40 aMN 1.3:B 85/1142azdocs1 aAllen, Milton Arthur,d1890-    .10aFluorspar,cby M. A. Allen and G. M. Butler.  Published by the University of Arizona, Arizona Bureau of mines.  aTucson, Ariz.,c1921.  a19 p.c23 cm.0 a[Arizona.  State bureau of mines]  Bulletinvno. 114.  Mineral technology series, no. 25  aAt head of title: ... University of Arizona bulletin.  aCover title.  a"Selected bibliography": p. 18-19. 0aFluorspar.1 aButler, G. M.q(Gurdon Montague),d1881-ejoint author.  c26113d26113