00297nam a2200121Ia 4500082002000000100002000020245003300040260002800073300001400101490005000115500000500165700000500170  a515.42bH194.LE  aHalmos, Paul R.  aLectures on ergodic theoryb  aNew YorkbChelseac1956  avii, 99p.  aMathematical Society of Japan publns. v no.3  a  a