00741cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001900092040004700111042001200158050002500170100003500195245005100230260002000281300002500301410007000326500001700396500005600413650001300469999001700482gs 55000288 DLC20260227111403.0780821r1955uuuunmua          000 0 eng c  ags 55000288   a(OCoLC)4156871  aU.S. Geol. Survey. Libr.cTxEUdOCoLCdDLC  apremarc00aTN24.N6bA235 no. 321 aWeber, Robert Harrison,d1919-10aProcessing perlite,bthe technologic problems.  aSocorro,c1955.  a3 p.billus.c28 cm.10aNew Mexico.bBureau of Mines and Mineral Resources.tCircularv32  aCover title.  a"Reprinted from Mining engineering, February 1955." 0aPerlite.  c28992d28992