000			00271 a2200121 4500
080			_a552 _bS 762 G
245	1		_aGuide to the study of rocks _cby L.E. Spock
260			_aNew York _c1953
650			_aRocks
100	1		_aSpock, L.E. _d
300			_a256 p.
901			_a67403
999			_c30246 _d30246