TY  - BOOK
AU  - Johnson Norman L.
AU  -  Kotz Samuel
TI  - Urn models and their application: An approach to modern discrete probability theory
T2  - Wiley Series in Probabilty and Mathematical Statistics
U1  - B281, L73 
PY  - 1977///
CY  - New York 
PB  - John Wiley     
KW  - Probability
ER  -