Columbia subject headings:
Constitutional conventions--Puerto Rico.
Puerto Rico--Relations--United States.
Self-determination, National--Puerto Rico.
United States--Relations--Puerto Rico.
Harvard subject headings:
Constitutional history--Puerto Rico
Puerto Rico--Relations--United States.
Self-determination, National--Puerto Rico
United States--Relations--Puerto Rico.
Princeton subject headings:
Constitutional convention--Puerto Rico.
Puerto Rico--Relations--United States.
Self-determination, National--Puerto Rico.
United States--Relations--Puerto Rico.