Preliminary results of radio-astronomical observations of annular solar eclipse, April 19, 1958 von Molchanov, A. P., Fan-Yun, Chen, Shou-Kuang, Wang, Mirzabekian, E. G., Salomonovich, A. E.

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Generation of laser radiation of difference frequency in a rectangular millimeter waveguide von Avetisyan, Yu O, Martirosyan, R M, Mirzabekyan, É G, Pogosyan, P S

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