Columbia subject headings:
Harvard subject headings:
Astrometry
Astronomers--Soviet Union--Biography.
Geodynamics.
Orlov, A. I︠A︡. (Aleksandr I︠A︡kovlevich)
Orlov, A. I︠A︡. (Aleksandr I︠A︡kovlevich), 1880-1954
Princeton subject headings:
Astrometry.
Astronomers--Soviet Union--Biography.
Geodynamics.
Orlov, A. I︠A︡. (Aleksandr I︠A︡kovlevich)