An attempt to determine photovisual magnitudes without a colour-filter and a study of the colours and the magnitudes of the stars in the galactic cluster Messier 7 and its surroundings
- Författare
- Åke Wallenquist
- Genre
- theses
- Språk
- Engelska
| Förlag | År | Ort | Om boken | ISBN |
|---|---|---|---|---|
| 1931 | Sverige, Bandoeng | 52,(1)s |