Columbia subject headings:
Germany.
Russia.
Harvard subject headings:
Germany
Medicine--Germany--History--18th century--Congresses.
Medicine--Germany--History--19th century--Congresses.
Medicine--Russia--History--18th century--Congresses.
Medicine--Russia--History--19th century--Congresses.
Russia
Princeton subject headings:
Germany--Relations--Russia--Congresses.
Medicine--Germany--History--Congresses.
Russia--Relations--Germany--Congresses.