Magnetograms and hourly values, Cheltenham, Maryland.
- Publisher:
- Print ISSN: 0498-9473
- Electronic ISSN:
- OCLC Number: 32286708
- Subject: Geomagnetism Maryland Cheltenham.
- Subject code: QC
- Publication history: 1950-
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | 1950-51; 1952-54; 1955 | permanent |