Columbia subject headings:
Fonfrías, Ernesto Juan.
Muñoz Marín, Luis, 1898-1980.
Partido Popular Democrático (P.R.)
Puerto Rico--Politics and government--1898-1952.
Harvard subject headings:
Fonfrías, Ernesto Juan.
Muñoz Marín, Luis, 1898-1980--Correspondence.
Partido Popular Democratico (P.R.)
Politicians--Puerto Rico--Biography.
Puerto Rico--Politics and government.
Princeton subject headings: