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           Aggarwal, R K
               NRSA technical reports, 1977 \ R K Aggarwal - Secunderabad : NRSA, 1977.
               V4 (vp.) - NRSA TR; 0031-0040 .
                V4: An experiment on calibration of multispectral photography for determination of reflectance from photographic densities

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                Subjects: Remote sensing; Multispectral photography.