Columbia subject headings:
Harvard subject headings:
Poets, Greek (Modern)--Correspondence.
Ritsos, Giannēs, 1909-1990--Correspondence.
Princeton subject headings:
Poets, Greek (Modern)--20th century--Correspondence.
Ritsos, Giannēs, 1909-1990--Correspondence.
Ritsou-Glezou, Loula--Correspondence.