@BOOK{ Book!D - 100980192,
AUTHOR = "/ Compiled and with solutions by Charles T. Salkind ...(and others)",
TITLE = "The contest problem book ",
LIBRARY= "كتابخانه پردیس علوم (دانشگاه تهران)",
SUBJECT = "Mathematics -- Problems, exercises, etc.",
URL = "/book/100980192/The-contest-problem-book/"}