00281nam a2200097   4500082001500000100001600015245005800031260004700089300000900136490003800145  a661.22 BED  aBedwell,W.L  athe production of Sulpuric acid from calcium sulphate  aLondonbRoyal Institute 0f Chemistryc1952  a21 p  aLectures,monographs and reports 3