@BOOK{ Book!D - 99028084,
AUTHOR = "/ by IBM corp.and Microsoft, Inc.1-st ed",
TITLE = "Dos 3.20 Users guide",
LIBRARY= "کتابخانه مرکزی و مرکز اسناد دانشگاه تهران",
SUBJECT = "IBM personal computer,Operating syatems (computers)",
URL = "/book/99028084/Dos-320-Users-guide/"}