Ray, M.
A text book of spherical astronomy for post-graduate & honours classes of Indian and foreing universities / M. Ray - Agra : Student's Friends & Co., 1961. - 230p.
Astronomy : Spherical
522.7
A text book of spherical astronomy for post-graduate & honours classes of Indian and foreing universities / M. Ray - Agra : Student's Friends & Co., 1961. - 230p.
Astronomy : Spherical
522.7