Columbia subject headings:
Avant-garde (Aesthetics)
De Stijl (Art movement)
Doesburg, Theo van, 1883-1931--Correspondence.
Kok, Antony, 1882-1969--Correspondence.
Harvard subject headings:
Artists--Netherlands--Correspondence.
Doesburg, Theo van, 1883-1931--Correspondence.
Kok, Antony, 1882-1969--Correspondence.
Poets, Dutch--20th century--Correspondence.
Princeton subject headings:
Artists--Netherlands--Correspondence.
Doesburg, Theo van, 1883-1931--Correspondence.
Kok, Antony, 1882-1969--Correspondence.
Poets, Dutch--20th century--Correspondence.