Columbia subject headings:
Philosophers--Russia--Correspondence.
Solovyov, Vladimir Sergeyevich, 1853-1900--Correspondence.
Harvard subject headings:
Philosophers--Russia--Correspondence.
Solovyov, Vladimir Sergeyevich, 1853-1900--Correspondence.
Princeton subject headings:
Philosophers--Russia--Correspondence.
Solovyov, Vladimir Sergeyevich, 1853-1900--Correspondence.