Columbia subject headings:
Harvard subject headings:
Art dealers--Biography.
Art--Collectors and collecting--Biography.
Gay men--Switzerland--Biography.
Mettler, Kurt, 1905-1930--Diaries.
Princeton subject headings:
Art dealers--Biography.
Art--Collectors and collecting--Biography.
Diaries.
Gay men--Switzerland--Biography.
Mettler, Kurt, 1905-1930--Diaries.