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Message * Ot Pervogo Radiopriemnika K Sovremennym Sredstvam Svi︠a︡zi Materialy Nauchno-Prakticheskoĭ Konferent︠s︡ii, Posvi︠a︡shchennoĭ 140-Letii︠u︡ So Dni︠a︡ Rozhdenii︠a︡ A.S. Popova, G. Ekaterinburg, 16-17 Marta 1999 G. - 5785101483 - 9785785101487