Historia de los Partidos Políticos Puertorriqueños (1898–1956)

Historia de los Partidos Políticos Puertorriqueños (1898–1956) (English: History of the Puerto Rican Political Parties (1898–1956)) is Bolívar Pagán's 1959 flagship two-volume set on Puerto Rico's political parties. It covers political parties in the years since the American invasion of 1898 through the year 1956.