000			00312nam a2200133Ia 4500
008			180611s9999||||xx |||||||||||||| ||und||
041			_aen
082			_a551
100			_aTHURBER,Walter A
245		0	_aExploring earth science
260			_bBoston. Allyn & Bacon, US _c1977
300			_a(viii),503
942			_cLL
999			_c1501 _d1501