Columbia subject headings:
Harvard subject headings:
Modersohn, Otto, 1865-1943--Correspondence.
Modersohn, Otto, 1865-1943.
Rilke, Rainer Maria, 1875-1926. Correspondence
Worpsweder Künstlervereinigung.
Princeton subject headings:
Modersohn, Otto, 1865-1943--Correspondence.
Modersohn, Otto, 1865-1943.
Rilke, Rainer Maria, 1875-1926. Correspondence.
Worpsweder Künstlervereinigung.