00343nam a2200121Ia 4500082002000000100001800020245005100038260005400089300001000143490005800153500000500211700000500216  a515.72bB952.AS  aBures, Donald  aAbelian sub algebras of Von Neumann algebrasb  aRhode IslandbAmerican Mathematical Societyc1971  a127p.  aMemoirs of the American Mathematical Societyv no.110  a  a