Columbia subject headings:
Artists--Spain--Correspondence.
Gris, Juan, 1887-1927--Correspondence.
Gris, Juan, 1887-1927--Exhibitions.
Harvard subject headings:
Gris, Juan, 1887-1927--Correspondence.
Gris, Juan, 1887-1927--Exhibitions.
Rosenberg, Léonce, 1879-1947--Correspondence.
Princeton subject headings:
Gris, Juan, 1887-1927--Correspondence.
Gris, Juan, 1887-1927--Exhibitions.
Rosenberg, Léonce, 1879-1947--Correspondence.