00458nam a2200169u  450000500170000000700030001700800410002002000180006110000240007924500480010326000470015130000110019850000140020965000300022365000100025370000250026320190501180429.0ta991012|||||||||||||||||||||||||||||eng|u  a0-395-56275-91 aPough, Frederick H.10aPeterson first guides to rocks and minerals0 aBoston, MAbHoughton Mifflin Companyc1991  a128 p.  aD., 10/99 4aMineralogy--Determinative 4aRocks  aPeterson, Roger Tory