000 00309nam a2200097 4500
100 _aU.S. Geological Survey, U.S.A
245 _aAmerican Mineralogist, vol.49,(1-6)
_cU.S. Geological Survey, U.S.A
260 _aU.S. Geological Survey, U.S.A
_c1964
260 _aU.S. Geological Survey, U.S.A
_c1964
942 _cCR
999 _c335283
_d335283