Program: HathiTrust Digital Library
- Publisher: Information and Volunteer Services of Allegheny County
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 777030452
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1940; 1960; 1963; 1968; 20th.ed. 1974; 21st.ed. 1984; 22nd.ed. 1986; 23rd.ed. 1990; 24th.ed. 1992; 25th.ed. 1994
|
committed to retain | 2018-08-26 | HTDL |
|