@BOOK{ Book!D - 91702036,
AUTHOR = "Greitzer, Samuel L.",
TITLE = "International mathematical olympiads, 1959-1977",
LIBRARY= "کتابخانه مرکزی دانشگاه صنعتی امیرکبیر",
SUBJECT = " Mathematics - Problems, exercises, etc  ",
URL = "/book/91702036/International-mathematical-olympiads-19591977/"}