000			00217nam a2200097 4500
100			_aGSA,
245			_aBullettin of Geol. Soc. America,vol.94(1-6) _cGSA,
260			_aGSA, _c1983
260			_aGSA, _c1983
942			_cCR
999			_c336942 _d336942