Columbia subject headings:
Nell, Eugen, 1905-1994.
Nell-Runnebaum, Waltraud, 1915-
Painters--Germany--Biography.
Harvard subject headings:
Nell, Eugen, 1905-1994--Criticism and interpretation.
Nell-Runnebaum, Waltraud, 1915---Criticism and interpretation.
Princeton subject headings:
Nell, Eugen, 1905-1994--Criticism and interpretation.