000 00251nam a2200097 4500
999 _c335081
_d335081
082 _a551.7
_bWEL.S
100 _aWeller, J. Marvin
245 _aStratigraphic Principles and Practice
_cWeller, J. Marvin
260 _aNew York
_c1960
_bHarper
942 _cBK