Columbia subject headings:
Harvard subject headings:
Olivares, Gaspar de Guzmán, conde-duque de, 1587-1645.
Spain--Politics and government--1621-1665.
Statesmen--Spain--Biography.
Princeton subject headings:
Olivares, Gaspar de Guzmán, conde-duque de, 1587-1645.
Spain--Politics and government--1621-1665.
Statesmen--Spain--Biography.