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Lagapskoe phosphorite deposit in Khabarovsk Krai
February 3-10, 1977. USSR. Khabarovsk Krai. Geologists Sergei Antipov and Vladimir Artyukh (left to right) during research at the Lagap phosphorite deposit near the eastern section of the Baikal-Amur Mainline. The exact date of the photo has not been established. Viktor Marikovsky/TASS