@BOOK{ Book!D - 104534741,
AUTHOR = "L.E.Sigler",
TITLE = "Exercises in set theory",
LIBRARY= "کتابخانه مرکزی و مرکز نشر دانشگاه بیرجند (دکتر محمد حسن گنجی)",
SUBJECT = "، Set theory - Problems, exercises, etc",
URL = "/book/104534741/Exercises-in-set-theory/"}