@BOOK{ Book!D - 103394603,
AUTHOR = "/ Herbert B. Enderton",
TITLE = "A mathematical introduction to logic",
LIBRARY= "كتابخانه مركزی و مركز اسناد دانشگاه شهيد چمران",
SUBJECT = "Logic, Symbolic and mathematical.",
URL = "/book/103394603/A-mathematical-introduction-to-logic/"}