Columbia subject headings:
Harvard subject headings:
Catholic Church--Relations--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--19th century.
Gagarin, J. (Jean), 1814-1882--Friends and associates.
Gagarin, J. (Jean), 1814-1882.
Jesuits--France--Biography.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Catholic Church--History--19th century.
Princeton subject headings:
Catholic Church--Relations--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--19th century.
Gagarin, J. (Jean), 1814-1882--Friends and associates.
Gagarin, J. (Jean), 1814-1882.
Jesuits--France--Biography.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Catholic Church--History--19th century.