Columbia subject headings:
Astronomers--Soviet Union--Biography.
Ėpik, Ėrnst I͡Ulius, 1893-1985.
Harvard subject headings:
Astronomers--Soviet Union--Biography.
Ėpik, Ėrnst I︠U︡lius, 1893-1985--Bibliography.
Ėpik, Ėrnst I︠U︡lius, 1893-1985.
Princeton subject headings:
Astronomers--Soviet Union--Biography.
Ėpik, Ėrnst I︠U︡lius, 1893-1985.