1. Audiovisual learning resource area Publication: 1977 Subject(s): Libraries, MedicalNational Library of Medicine (U.S.). Reference Services Division.
2. [Audiovisual learning resource] Publication: 1977 Subject(s): Libraries, MedicalNational Library of Medicine (U.S.). Reference Services Division.
3. [Classification listing in the AV area] Publication: 1977 Subject(s): Libraries, MedicalNational Library of Medicine (U.S.). Reference Services Division.