000			00288nam a2200097 4500
999			_c334131 _d334131
082			_a560 _bTWE.I
100			_aTwenhofel,William H.and Shrock,Robert R
245			_aInvertebrate Palaeontology _cTwenhofel,William H.and Shrock,Robert R
260			_aNew York _c1935 _bMc Graw Hill
942			_cBK