Columbia subject headings:
Isai︠a︡nt︠s︡, Valeriĭ Ivanovich.
T︠S︡vetaeva, Anastasii︠a︡, 1894-1993--Friends and associates.
Harvard subject headings:
Authors, Russian--20th century--Biography
Isai︠a︡nt︠s︡, Valeriĭ Ivanovich.
Poets, Russian--20th century--Biography
T͡Svetaeva, Anastasii͡a, 1894-1993--Friends and associates.
Princeton subject headings: