Columbia subject headings:
Russians--Political activity--Foreign countries.
Vrangelʹ, Petr Nikolaevich, Baron, 1878-1928--Last years.
Harvard subject headings:
Russians--Foreign countries--Political activity.
Vrangelʹ, Petr Nikolaevich, Baron, 1878-1928--Last years.
Princeton subject headings:
Russians--Foreign countries--Political activity.
Vrangelʹ, Petr Nikolaevich, Baron, 1878-1928--Last years.