4.
Kraitchik, M. (a)
La mathématique des jeux ou Récréations mathématiques, (
Steven Frères,
Brussels,
1930;
2nd ed., Editions techniques et scientifiques, Brussels, 1953); in English translation as (b)
Mathematical Recreations, (W. W. Norton, New York, NY, 1942;
Allen, George and Unwin, London, UK, 1943; 2nd ed., Dover Pub. Inc., New York, NY, 1953).
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