Columbia subject headings:
Harvard subject headings:
Krüdener, Barbara Juliane, Freifrau von, 1764-1824.
Quakers--Russia--History--19th century.
Russia--Church history--1801-1917.
Russia--History--Alexander I, 1801-1825.
Russkoe bibleĭskoe obshchestvo (Saint Petersburg, Russia)
Sects--Russia--History--19th century.
Princeton subject headings:
Russia--Church history--1801-1917.
Russia--History--Alexander I, 1801-1825.
Russia--Religion.