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Browsing by Subject Absorption Markings: Hα
Showing results 1 to 2 of 2
| Issue Date | Title | Author(s) |
|---|---|---|
| 1911-06 | The absorption markings in Hα spectroheliograms | Royds, T |
| 1912-12 | Distribution in latitude of the absorption markings in Hα spectroheliograms | Royds, T |