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Tenquist D W, Whittle R M & Yarwood J. (1970). University optics. : .
Tenquist D W, Whittle R M and Yarwood J. 1970. University optics. : .
Tenquist D W, Whittle R M and Yarwood J. (1970). University optics. : .
Tenquist D W, Whittle R M and Yarwood J. University optics. : . 1970.
