Columbia subject headings:
Beli︠a︡kova, Alla Mikhaĭlovna, 1914-2006--Correspondence.
Ėfron, Ariadna, 1912-1975--Correspondence.
Harvard subject headings:
Beli͡akova, Alla Mikhaĭlovna--Correspondence.
Women authors, Russian--Correspondence.
Ėfron, Ariadna, 1912-1975--Correspondence.
Princeton subject headings:
Beli︠a︡kova, Alla Mikhaĭlovna--Correspondence.
Ėfron, Ariadna, 1912-1975--Correspondence.