ISBN 0486453510 books & textbook
Mathematical Conversations: Multicolor Problems, Problems in the Theory of Numbers, and Random Walks (Dover Books on Mathematics)
Dynkin, E. B. Uspenskii, V. A. Mathematics
Dover Publications /2006-12-01 Paperback / 288 Pages
isbn-10: 0486453510 / isbn-13: 9780486453514
