Columbia subject headings:
Polanco Abreu, Santiago, 1920-1988.
Puerto Rico--Politics and government--1952-1998.
Harvard subject headings:
Polanco Abreu, Santiago, 1920-1988.
Puerto Rico--Politics and government--1952-1998.
Princeton subject headings:
Legislators--Puerto Rico.
Polanco Abreu, Santiago, 1920-1988.
Puerto Rico--Politics and government--1952-1998.