00372nam a2200121Ia 4500082002000000100002300020245009400043260003500137300001600172490005200188500000500240700000500245  a519.931bK97.PM  aKushner, Harold J.  aProbability methods for approximations in stochastic control and for elliptic equationsb  aNew YorkbAcademic Pressc1977  axvii, 243p.  aMathematics in Science and Engineeringv v. 129  a  a