00397    a2200121   4500008004200000020001500042082002100057100001800078245005000096260005400146300002700200440004800227240125b        |||||||| |||| 00| 0 eng d   a0821804944  a515.42bAa113.IE  aAaronson, Jon  aAn introduction to infinite ergodic theory /   aProvidence:bAmerican Mathematical Society,c1997  axii, 284p. Bibl. Index  aMathematical surveys and monographs ; v. 50