Columbia subject headings:
Harvard subject headings:
Platonova, V. A. (Varvara Aleksandrovna)--Correspondence.
Ukhtomskiĭ, A. A. (Alekseĭ Alekseevich)--Correspondence.
Princeton subject headings:
Platonova, V. A. (Varvara Aleksandrovna)--Correspondence.
Ukhtomskiĭ, A. A. (Alekseĭ Alekseevich)--Correspondence.