Subrahmanyam,N, & Lal, B. (1966). A text book of Optics: For B.Sc(pass, honours and subsidiery), engineering students of Indian Universities and IAS examinations\. S.Chand & Company.

Subrahmanyam,N, and Brij Lal. A Text Book of Optics: For B.Sc(pass, Honours and Subsidiery), Engineering Students of Indian Universities and IAS Examinations\. New Delhi: S.Chand & Company, 1966.

Subrahmanyam,N, and Brij Lal. A Text Book of Optics: For B.Sc(pass, Honours and Subsidiery), Engineering Students of Indian Universities and IAS Examinations\. S.Chand & Company, 1966.