Columbia subject headings:
Harvard subject headings:
Probst, Christoph, 1919-1943--Correspondence.
Schmorell, Alexander, 1917-1943--Correspondence.
Weisse Rose (Resistance group)
Princeton subject headings:
Probst, Christoph, 1919-1943--Correspondence.
Schmorell, Alexander, 1917-1943--Correspondence.
Weisse Rose (Resistance group)