@BOOK{ Book!D - 90020687,
AUTHOR = " Robert A. Beeler",
TITLE = "How to count :",
LIBRARY= "مرکز و کتابخانه مطالعات اسلامی به زبان‌های اروپایی",
SUBJECT = "Combinatorial analysis.,Combinatorics.,Mathematics.",
URL = "/book/90020687/How-to-count/"}