Columbia subject headings:
Art, German--20th century--Societies, etc.--Directories.
Artists--Austria--Societies, etc.--Directories.
Artists--Europe--20th century--Societies, etc.--Directories.
Artists--Germany--Societies, etc.--Directories.
Artists--Switzerland--Societies, etc.--Directories.
Harvard subject headings:
Art, German--20th century.
Art, Modern--20th century--Austria.
Art, Modern--20th century--Switzerland.
Artists--Austria--Societies, etc.
Artists--Germany--Societies, etc.
Artists--Switzerland--Societies, etc.
Princeton subject headings:
Artists--Austria--Encyclopedias.
Artists--Germany--Encyclopedias.
Artists--Switzerland--Encyclopedias.