00459nam a2200133Ia 4500008004100000082001900041100002400060245006400084260003000148300002000178440003400198490005300232500004000285260902b        |||||||| |||| 00| 0 eng d  a511.5bL929.DG  aLubotzky, Alexander  aDiscrete groups, expanding graphs and invariant measuresb/  aBasel:bBirkhauser,c1994  axi, 195p. Index  aProgress in Mathematics ; 125  aFerran Sunyer i Balaguer award winning monograph  a"Appendix by Jonathan D. Rogawski".