Mathematical problems and puzzles : from the Polish mathematical olympiads / S. Straszewicz ; Translated from Polish by J. Smólska. Zadania z olimpiad matematycznych. English Straszewicz, S. (Stefan) Mathematics Problems, exercises, etc. QA43 .S8183 512.9 STM Translation of Zadania z olimpiad matematycznych. Oxford ; New York : Pergamon Press, 1965. 1965. 1965 Text viii, 367 p. : eng engpol Popular lectures in mathematics ; v. 12 Popular lectures in mathematics (New York, N.Y.) ; v. 12.