00276nam a2200109 a 450000500170000008200190001710000230003624500330005926000340009230000210012670000190014720251203090509.0  a519.2,bD, gri  aGrimmett, Geoffrey  aProbability: an introduction  aOxfordbClarendon Pressc1986  aix, 211p, 23 cm.  aWelsh, Dominic