000			00318nam a2200133Ia 4500
008			180612s9999||||xx |||||||||||||| ||und||
041			_aen
082			_a912.55
100			_aTHURBER,Walter A
245		0	_aExploring earth science
260			_aBoston. _bAllyn & Bacon, US _c1976
300			_aviii,503p.
942			_cPR
999			_c38973 _d38973