Col Reference --- --------- R1 Pandey A.K., Mahra H.S. 1986, Astrophys. Space Sci. 120, 107 R2 Bhatt B.C., et al. 1994, Bull. Astron. Soc. India 22, 191 Back to the form
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R1 Pandey A.K., Mahra H.S. 1986, Astrophys. Space Sci. 120, 107
R2 Bhatt B.C., et al. 1994, Bull. Astron. Soc. India 22, 191