@BOOK{ Book!D - 103969067, AUTHOR = "Gardiner, A.", TITLE = "Discovering mathematics; the art of investigation", LIBRARY= "کتابخانه مرکزی و مرکز اسناد دانشگاه اصفهان", SUBJECT = "Problem solving ► Mathematics-Problems, exercises, etc", URL = "/book/103969067/Discovering-mathematics-the-art-of-investigation/"}