00586nam a2200193Ia 450000500170000000800410001702000110005804000190006904100120008808200130010010000180011324500920013126000270022330000480025050400500029865000170034865100170036585000100038220220805144957.0131103s9999    xx            000 0 und d  cRs. 30  aLoreto College  aEnglish  a552bTYR  aTyrrell G . W 4aThe principle of petrologyb an introduction to  the science of rocks cG . W . Tyrrell  aLondonbMethuen c1926  axii , 349pb ill. charts , figures , tables  aIncludes bibliographical references and index  aPetrology -   aPetrology -   aLCLIB