000			00267nam a2200097 4500
999			_c334216 _d334216
082			_a553..5 _bLAD.N
100			_aLadoo Raymond B and Myers, W.M.
245			_aNonmetallic minerals _cLadoo Raymond B and Myers, W.M.
260			_aNewYork _c1953 _bMcGraw-Hill
942			_cBK