TY  - BOOK
AU  - Freedman David
TI  - Approximating countable Markov chain
T2  - Holden-Day series in probability and statistics
U1  - B281N07, L21;1 
PY  - 1972///
CY  - San Francisco 
PB  -  Holden-Day        
KW  -  markov chain
KW  - countable
ER  -