Columbia subject headings:
Harvard subject headings:
Artists--Belgium--Correspondence.
Artists--Netherlands--Correspondence.
Doesburg, Theo van, 1883-1931--Correspondence.
Mondrian, Piet, 1872-1944--Correspondence.
Vantongerloo, Georges, 1886-1965--Correspondence.
Vantongerloo, Georges, 1886-1965--Criticism and interpretation.
Princeton subject headings:
Artists--Belgium--Correspondence.
Artists--Netherlands--Correspondence.
Doesburg, Theo van, 1883-1931--Correspondence.
Mondrian, Piet, 1872-1944--Correspondence.
Vantongerloo, Georges, 1886-1965--Correspondence.
Vantongerloo, Georges, 1886-1965--Criticism and interpretation.