@BOOK{ Book!D - 100879312,
AUTHOR = "/ par G. Polya",
TITLE = "La decouverte des mathematiques",
LIBRARY= "دانشکده اقتصاد (دانشگاه تهران)",
SUBJECT = "Mathematics-Problems, exercises, etc,problems solving",
URL = "/book/100879312/La-decouverte-des-mathematiques/"}