For more information, see the library's Government Documents Web Site . An abstract and a bibliography usually appear within an article. A keyword may be in the title, abstracts, notes, or descriptor fields . Terms used by the Library of Congress to divide knowledge into related subject areas, and by the library to arrange books on the shelves. Volumes are located near the reference desk .
Limits are database specific.
The most commonly available limits are language, type of publication, and year. A periodical intended for the general public. Examples are National Geographic , Time , Psychology Today , and Business Week . Books, articles or other items that are printed in miniature form on rolls or sheets of transparent plastic. Those that are in long rolls are called microfilm, while those that are on small rectangular sheets are called microfiche.