Source of title proper note (9.7B3, 12.7B3; MARC 500)
Required for all electronic resources; frequently combined with Item described note
Include the name of the provider if serial available from multiple providers
Include the file format for serials available in multiple formats
500 Title from home page (publisher's website, viewed Mar. 22, 2003).
500 Title from caption (IDEAL, viewed May 20, 2003).
500 Description based on: Vol. 5, no. 1 (Jan. 1995); title from contents (OCLC FirstSearch, viewed June 10, 2003).