Damaged and threatened national natural landmarks.
- Publisher: U.S. Dept. of the Interior, National Park Service
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 20079509
- Subject: Natural monuments United States Periodicals.
- Subject code: QH
- Publication history:
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | 1987 1987; 1988-1989; 1989 1989; 1991 1991; 1992-1993; 1994 1994 | permanent |