000 00304pam a2200121a 44500
010 _a65060049
082 _a530.6
_bN21N V.41
100 _aNational Research Council
245 1 _aGEOCHRONOLOGY OF NORTH AMERICA
260 _a
_bNational Academy Of Sciences
_c1965
964 _gCIRC
997 _a58307 C
999 _c410833
_d410833