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Angarsk expedition of the All-Union Institute "Hydroproject"
August 1975. USSR. Chita Region. Members of the expedition of the All-Union Design, Survey and Research Institute "Gidroproekt" named after S. Ya. Zhuk, chief engineer of the Vitimskaya hydroelectric power station project G. Maksimov and geologist A. Efremov (from left to right) during research on the Vitim River. The exact date of the photo is not established. Grigory Kalachyan/TASS