@BOOK{ Book!D - 77776928,
AUTHOR = "Straszewicz,Stefan",
TITLE = "Mathemtical problems and Puzzles from the Polish mathematical olympiads",
LIBRARY= "کتابخانه مرکزی و مرکز اطلاع رسانی دانشگاه فردوسی مشهد",
SUBJECT = "Problems, exercises, etc ، Mathematics",
URL = "/book/77776928/Mathemtical-problems-and-Puzzles-from-the-Polish-m/"}