00401    a2200157   4500020001500000082001700015100001900032245003000051250001200081260004400093300002300137440003300160650001600193650001600209650001800225  a0387951547  a519.282bSPI  aSpitzer, Frank  aPrinciples of Random Walk  a2nd ed.  aNew YorkbSpringer - Verlagc1964g2001  axiii, 410p.c24cm.  aGraduate text in mathematics  aMATHEMATICS  aRANDOM WALK  aPROBABILITIES