The sunspot period : (with one plate) / by H. Helm Clayton.
| Author/creator | Clayton, Henry Helm |
| Format | Book |
| Publication Info | Washington : Smithsonian Institution, 1939. |
| Description | 1 preliminary leaf, 18 pages : illustrations (maps) diagrams, plates. ; 25 cm. |
| Subjects |
| Series | Smithsonian miscellaneous collections ; v. 98, no. 2 Smithsonian miscellaneous collections v. 98, no. 2. ^A638971 |
| Local note | Joyner-FOR JOYNER LIBRARY HOLDINGS OF THE SERIES, SMITHSONIAN MISCELLANEOUS COLLECTIONS, SEARCH BY CALL NUMBER Q11 .S7. |
| General note | Publication 3526. |
| LCCN | 39026413 |