Columbia subject headings:
Eichholz, Georg--Correspondence.
Held, Heinrich, 1897-1957--Correspondence.
Iwand, Hans Joachim, 1899-1960--Bibliography.
Iwand, Hans Joachim, 1899-1960--Correspondence.
Iwand, Hans Joachim, 1899-1960.
Harvard subject headings:
Eichholz, Georg--Correspondence.
Held, Heinrich, 1897-1957--Correspondence.
Iwand, Hans Joachim, 1899-1960
Iwand, Hans Joachim, 1899-1960--Bibliography.
Iwand, Hans Joachim, 1899-1960--Correspondence.
Princeton subject headings: