00884nam--2200325---450-99000216139020331620041111111002.0000216139USA01000216139(ALEPH)000216139USA0100021613920041111d1972----km-y0itay0103----baengUS||||||||001yyApproximating countable Markov chainsDavid FreedmanSan FranciscoHolden-Day1972X, 140 p.24 cm20012001001-------2001FREEDMAN,David534682ITsalbcISBD990002161390203316Senza coll.175 G.Senza coll.BKGIUSIAV21020041111USA011110Approximating countable Markov chains910688UNISA