Columbia subject headings:
Harvard subject headings:
Aristocracy (Social class)--Germany--Erbach (Baden-Württemberg)--Biography--Sources.
Erbach (Baden-Württemberg, Germany)--History--Sources.
Nobility--Germany--Erbach (Baden-Württemberg)--Biography--Sources.
Nobility--Germany--Erbach (Baden-Württemberg)--History--Sources.
Nobility--Germany--Ulm Region--History--Sources.
Schlossarchiv Erbach--History.
Ulm Region (Germany)--History--Sources.
Princeton subject headings:
Erbach (Baden-Württemberg, Germany)--History--Sources.
Nobility--Germany--Erbach (Baden-Württemberg)--History--Sources.
Nobility--Germany--Ulm Region--History--Sources.
Ulm Region (Germany)--History--Sources.