En
RuExpeditions to the Urals and the Volga Region
Expeditions to the Urals and the Volga Region
Diamond drilling of the Kuznechikhinsky exploration of the Karabash copper smelter in the Urals (1929)
Diamond drilling of the Kuznechikhinsky exploration of the Karabash copper smelter in the Urals (1929). Film of 1929.
1929
РГАКФД
A group of geologists are studying the soil to build a bridge across the river. Kazan (1932)
A group of geologists are studying the soil to build a bridge across the river. Kazan (1932). 1932.
1932
РГАКФД