Sposob osmotra stenok i zaboi͡a︡ skvazhin
By: A.M. Viktorov.
Publisher: Gos. nauchno-tekhn. izd-vo lit-ry po geologi i okhrane nedr
Published: 1954
Place of publication: Moskva
Language: rus
Number of pages: 14
Subjects: Borings.; Optical instruments.