000			00348nam a2200157Ia 4500
008			181012s9999 xx 000 0 und d
020			_a9780393263398
082			_a550 MAR
100			_a"MARSHAK, STEPHEN"
245		0	_aESSENTIALS OF GEOLOGY
250			_a4TH
300			_a629 P
365			_b8108
650			_aEARTH SCIENCE
942			_cREF
999			_c20856 _d20856