Periodicals are publications which a published in units with no pre-established number of issues or ending data.
Periodicals include journals, messages, negotiations and reports issued by associations and companies in addition to series of monographs, yearbooks, directories, newspapers etc.
Multivolume encyclopedias are not defined as periodicals, because they are supposed to be finished sometime in the future.
Literature:
Universitetsbiblioteket i Oslo: ISSN. Internasjonalt standardnummer
for periodika. Oslo: Universitetsbiblioteket i Oslo, 1993. (UBO Vejledninger :
14)
Bibliography:
Ulrich's Periodicals Directory. http://library.dialog.com/bluesheets/html/bl0480.html
Birger Hjørland
Last edited: 29-03-2006