Columbia subject headings:
Harvard subject headings:
Alchemists--Germany--Biography--Congresses.
Alchemy--Germany--History--17th century--Congresses.
Salines--Germany--History--17th century--Congresses.
Thölde, Johannes--Congresses.
Thölde, Johannes--Criticism and interpretation--Congresses.
Princeton subject headings:
Alchemists--Germany--Biography--Congresses.
Alchemy--Germany--History--17th century--Congresses.
Salines--Germany--History--17th century--Congresses.
Thölde, Johannes--Congresses.
Thölde, Johannes--Criticism and interpretation--Congresses.