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OBREEMOV, Ivan was born in 1894.
1915 graduated Petrograd University.
1919-1924 at State Optical Institute. Since 1924 at Leningrad Physicotechn. Institute, then Ukrainia Physicotechn.Institute; 1929-1937 Director, latter Institute. 1933-1958 corresponding member, USSR Academy of Science. Specialist in physics of crystal and molecular spectroscopy.