Columbia subject headings:
John, of Austria, 1629-1679--Political and social views.
Spain--History--Philip IV, 1621-1665.
Harvard subject headings:
Illegitimate children of royalty--Spain--Biography.
John, of Austria, 1629-1679
Spain--History--Philip IV, 1621-1665
Spain--Kings and rulers--Children--Biography.
Princeton subject headings: