000 00261nam a22001217a 4500
082 _a549
_bBET/C
100 _aBetekhtin,A.
245 _aCourse of mineralogy
260 _aMoscow
_bPeace publishers
300 _a642p.
650 _aAgol,V.(Tr.)
942 _cBK
999 _c503716
_d503716