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Subramanyam N., Brijlal, . (1987). A textbook of optics. New Delhi: S.Chand.
Subramanyam N, Brijlal, . 1987. A textbook of optics. New Delhi: S.Chand.
Subramanyam N, Brijlal, . A textbook of optics. New Delhi: S.Chand. 1987.
