TY  - GEN
TI  - The natural wealth of the Soviet union and its exploitation - Image 20
AU  - Gubkin, I. M. (Ivan Mikhaĭlovich), 1871-1939
DA  - 1932
UR  - https://digital.lib.uh.edu/collection/scpamp/item/6492/show/6435
Y2  - April 20, 2021
ER  -