Columbia subject headings:
Harvard subject headings:
De Kooning, Willem, 1904-1997--Correspondence.
De Kooning, Willem, 1904-1997--Family relationships.
Kooning, Leendert de, 1876-1955--Correspondence.
Princeton subject headings:
Artists--United States--Correspondence.
De Kooning, Willem, 1904-1997--Correspondence.
De Kooning, Willem, 1904-1997--Family relationships.
Kooning, Leendert de, 1876-1955--Correspondence.