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Pappu, SV and Kumar, CA and Mehta, SD (1978) A Study of the Information content in the Harmonics of the Spatial Frequency spectra of Halftone images using Coherent Optical Computers. In: Current Science (Bangalore), 47 (1). 1 -6.
Mehta, SD and Gupta, PN (1978) Restoration of Aspect Ratio by Holographic Lenses In a Bragg-Diffraction Imaging-System. In: IEEE Transactions on Sonics and Ultrasonics, 25 (4). 262-262 .