Columbia subject headings:
Harvard subject headings:
Medicine--Puerto Rico--History--Sources.
Puerto Rico--History--1898-1952--Sources.
Puerto Rico--Social life and customs--Sources.
Spanish-American War, 1898--Personal narratives, Puerto Rican.
Spanish-American War, 1898--Puerto Rico.
Princeton subject headings:
Medicine--Puerto Rico--History--Sources.
Puerto Rico--History--1898-1952--Sources.
Puerto Rico--Social life and customs--Sources.
Spanish-American War, 1898--Personal narratives, Puerto Rican.
Spanish-American War, 1898--Puerto Rico.