@BOOK{ Book!D - 77823492,
AUTHOR = "Hein, James L.",
TITLE = "Discrete mathematics",
LIBRARY= "کتابخانه مرکزی و مرکز اطلاع رسانی دانشگاه فردوسی مشهد",
SUBJECT = "Mathematics ، Computer science",
URL = "/book/77823492/Discrete-mathematics/"}