Columbia subject headings:
Harvard subject headings:
Auer von Welsbach, Carl, Freiherr, 1858-1929--Congresses.
Chemists--Austria--Vienna--Congresses.
Inventors--Austria--Vienna--Congresses.
Scientists--Austria--Vienna--Congresses.
Princeton subject headings:
Auer v. Welsbach, Carl (Auer von Welsbach), 1858-1929--Congresses.
Chemists--Austria--Congresses.
Inventors--Austria--Congresses.