00382nam a2200121Ia 4500082002000000100004100020245004600061260003500107300002900142490005300171500000500224700003100229  a515.72bF299.ST  aFeintuch, Avraham and Saoks, Richard  aSystem theory; a Hilbert space approachb  aNew YorkbAcademic Pressc1982  axiii, 310p. Index, Bibl.  aPure and Applied Mathematicsv (Academic) v. 102  a  aSaoks, Richard ; jt. auth.