Columbia subject headings:
Boti y Barreiro, Regino Eladio, 1878-1958--Correspondence.
Guillén, Nicolás, 1902-1989--Correspondence.
Poets, Cuban--20th century--Correspondence.
Harvard subject headings:
Authors, Cuban--20th century--Correspondence.
Boti y Barreiro, Regino Eladio, 1878-1958--Correspondence.
Guillén, Nicolás, 1902-1989--Correspondence.
Princeton subject headings:
Boti y Barreiro, Regino Eladio, 1878-1958--Correspondence.
Guillén, Nicolás, 1902-1989--Correspondence.
Personal correspondence.
Poets, Cuban--20th century--Correspondence.