000			00319nam a2200133Ia 4500
005			20260205040244.0
008			260111s9999||||xx |||||||||||||| ||und||
082			_a551.7 G862G
100			_aGREGORG J W BARRETT B. H.
245		0	_aGENERAL STRATIGRAPHY
260			_aLOND. _bMETHUEN _c1931
300			_a285
942			_cBK
999			_c2862 _d2862