Publisher
Springer Science and Business Media LLC
Subject
Space and Planetary Science,Astronomy and Astrophysics
Reference12 articles.
1. El-Shaarawy, M. B., Aly, M. K., and Ghobros, R. A.: 1971,Helwan Institut Bull., No. 98.
2. Ghobros, R. A.: 1962,Z. Astrophys. 56, 2, 113.
3. Goldberg, L.: 1941,Astrophys. J. 93, 244.
4. Menzel, D. H.: 1937,Astrophys. J. 85, 330.
5. Menzel, D. H. and Baker, J. G.: 1937,Astrophys. J. 86, 70.