000 002970000a22001330004500
008 140223b1977 xxu||||| |||| 00| 0 eng d
041 _aENG
080 _aH2 L7
082 _aH2 L7
100 _aTyrrell (G W)
245 _aPrinciples of petrology
260 _c1977
650 _aPetrology
999 _c156337
_d156337