Columbia subject headings:
Puerto Rico--History--Archival resources.
Puerto Rico--History--Bibliography.
University of Puerto Rico (Río Piedras Campus). Centro de Investigaciones Históricas--Archival resources.
Harvard subject headings:
Princeton subject headings:
Puerto Rico--History--Archival resources--Puerto Rico--Río Piedras (San Juan).
Puerto Rico--History--Bibliography.
University of Puerto Rico (Río Piedras Campus). Centro de Investigaciones Históricas--Archival resources.