Columbia subject headings:
Governors--Puerto Rico--Biography.
Puerto Rico--Politics and government--1952-1998.
Sánchez Vilella, Roberto, 1913-1997.
Harvard subject headings:
Governors--Puerto Rico.
Puerto Rico--Politics and government--1952-1998.
Sánchez Vilella, Roberto, 1913-1997.
Princeton subject headings:
Governors--Puerto Rico.
Puerto Rico--Politics and government--1952-1998.
Sánchez Vilella, Roberto, 1913-1997.