@BOOK{ Book!D - 99031978,
AUTHOR = "/ by J. Smolska,Strszewicz",
TITLE = "Mathematical problems and puzzles from the Polish",
LIBRARY= "کتابخانه مرکزی و مرکز اسناد دانشگاه تهران",
SUBJECT = "Mathematics -- Problems, exercises, etc",
URL = "/book/99031978/Mathematical-problems-and-puzzles-from-the-Polish/"}