Columbia subject headings:
Harvard subject headings:
Gay couples--Germany--Biography.
Gay men--Germany--Biography.
Guckel, Peter, Dr.
Hahn, Siegbert, 1937-
Painters--Germany--Biography.
Princeton subject headings:
Gay couples--Germany--Biography.
Gay men--Germany--Biography.
Guckel, Peter, Dr.
Hahn, Siegbert, 1937-
Painters--Germany--Biography.