Não informado. (1980). Journal of Astrophysics and Astronomy. Indian Academy of Sciences.
Chicago-referens (17:e uppl.)Não informado. Journal of Astrophysics and Astronomy. Bangalore, India: Indian Academy of Sciences, 1980.
MLA-referens (8:e uppl.)Não informado. Journal of Astrophysics and Astronomy. Indian Academy of Sciences, 1980.
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