00599nam a22002177i 4500 230321m194 1976|||od||| |||| 001 0 eng d 0198518471 pbk. GCL 535 WEL Welford, W. T. Optics / W. T. Welford. Second edition. Oxford : Oxford University Press, 1984. vii, 150pages : illustrations ; 22 cm. text rdacontent txt unmediated n rdamedia volume nc rdacarrier Includes index. Physics ddc 0 0 ddc 0 535_000000000000000_WEL 0 454 LPL LPL 2023-03-21 0 535 WEL 3226 2023-03-21 00:00:00 2023-03-21 BK 263 263