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Construction of the Baikal-Amur Mainline
July 1977. USSR. Chita Region. Viktor Barkhaev, an engineer of the comprehensive survey party of the Leningrad Design and Survey Institute "Lengiprotrans", and student Lyudmila Egorova during a theodolite survey at the site of the future construction of a section of the Baikal-Amur Mainline. The exact date of the survey has not been established. Grigory Kalachyan/TASS