000			00481 a2200169 4500
082			_a557.3 _bUn3g
245	1		_aGEOLOGICAL SURVEY RESEARCH
260			_aWashington _bU. S. Govt. Print Off. _c1961
300			_av.,Y
440			_aIts Professional Paper _v
500			_aArt 147-292
500			_aVol. For 1960 Issued By The Survey'S Geologic Division
650			_aGeology -- U. S
650			_aGeology -- Addresses, Essays, Lectures
964			_gCIRC
997			_aA11299 C
999			_c459010 _d459010