Columbia subject headings:
Authors, Greek (Modern)--20th century--Correspondence.
Empeirikos, Andreas, 1901-1975--Correspondence.
Harvard subject headings:
Empeirikos, Andreas, 1901-1975--Correspondence.
Empeirikos, Andreas, 1901-1975.
Princeton subject headings:
Authors, Greek (Modern)--20th century--Correspondence.
Empeirikos, Andreas, 1901-1975--Correspondence.