Columbia subject headings:
Harvard subject headings:
Ivanov, Geogiĭ, 1894-1958--Correspondence.
Markov, Vladimir--Correspondence.
Odoevt︠s︡eva, Irina Vladimirovna, 1901---Correspondence.
Princeton subject headings:
Ivanov, Georgiĭ, 1894-1958--Correspondence.
Markov, Vladimir--Correspondence.
Odoevt︠s︡eva, Irina, 1895-1900--Correspondence.