000			00351nam a2200145Ia 4500
008			180611s9999||||xx |||||||||||||| ||und||
020			_a0 7854 2267 6
041			_aen
082			_a550
100			_aMARSHALL, Robert H.
245		0	_aEarth Science
260			_aCircle Pines, _bAmerican Guidence Service. _c2001
300			_ax, 311p.
942			_cLL
999			_c29960 _d29960