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Subrahmanyam N., Lal B. & AVADHANULU M. (2009). A TEXTBOOK OF OPTICS. New Delhi: S.Chand.
Subrahmanyam N, Lal Brij and AVADHANULU M.N. 2009. A TEXTBOOK OF OPTICS. New Delhi: S.Chand.
Subrahmanyam N., Lal B. and AVADHANULU M. (2009). A TEXTBOOK OF OPTICS. New Delhi: S.Chand.
Subrahmanyam N, Lal Brij and AVADHANULU M.N. A TEXTBOOK OF OPTICS. New Delhi: S.Chand. 2009.