Jha DK, Sinha HC, . (1969). Textbook of Co-Ordinate Geometry. Agra: Ram Prasad and Sons.
Jha DK, Sinha HC, . 1969. Textbook of Co-Ordinate Geometry. Agra: Ram Prasad and Sons.
Jha DK, Sinha HC, . Textbook of Co-Ordinate Geometry. Agra: Ram Prasad and Sons. 1969.