00434nam a2200121Ia 4500008004100000082001800041100002300059245008900082260003300171300002200204490006000226700002600286250707b        |||||||| |||| 00| 0 eng d  a519.2bJ68.UM  aJohnson, Norman L.  aUrn models and their applications; approach to modern discrete probability theoryb/  aNew York:bJohn Wiley,c1977  axiii, 402p. Index  aWiley series in Probability and Mathematical Statistics  aKotz, Samueleauthor.