538 Mode of access: All issues available via the World Wide Web; issues 1-8 also available via Internet ftp; tables of contents available via Internet email subscription.
Mode of access and System requirements notes (9.7B1; MARC 538)
Mode of access (mandatory note for remote resources)
Use only for unusual special software or hardware requirements (e.g., Adobe Acrobat reader)
Only give requirements that apply to all versions