Columbia subject headings:
Nakopoulou, Kalliopē I.
Poets, Greek (Modern)--Correspondence.
Vrettakos, Nikēphoros, 1911-1991--Correspondence.
Harvard subject headings:
Nakopoulou, Kalliopē I.
Poets, Greek (Modern)--Correspondence.
Vrettakos, Nikēphoros, 1911-1991--Correspondence.
Princeton subject headings:
Nakopoulou, Kalliopē I.
Personal correspondence.
Poets, Greek (Modern)--Correspondence.
Vrettakos, Nikēphoros, 1911-1991--Correspondence.