1. [Using the telephone to connect to the mainframe] Publication: [1975?] Subject(s): National Library of Medicine (U.S.). Index Section.
2. [A montage of NLM publications] Publication: [1975?] Subject(s): National Library of Medicine (U.S.). Index Section.
3. Index medicus Publication: [1975?] Subject(s): National Library of Medicine (U.S.). Index Section.