Answer:
The author.
-The author's last name or the name of the agency or organization responsible for the publication.
The title.
-The title will be typed in lowercase letters at the top of the card.
The subject.
-Subject terms used by the Library are listed in the Library of Congress Subject Headings, large red volumes which are found in the catalog areas. Subject cards are colored red on the top edge, and the subject headings are typed in capital letters at the top of the card. Subject entries in the card catalog may contain terms no longer employed by the Library.
