Columbia subject headings:
Spain--History--Isabella II, 1833-1868.
Spain--Politics and government--1833-1868.
Harvard subject headings:
Spain--History--Isabella II, 1833-1868.
Spain--Politics and government--1833-1868.
Princeton subject headings:
Luxán, Francisco de, 1798-1867.
Science and state--Spain--History--19th century.
Scientists--Spain--Biography.
Spain--History--Isabella II, 1833-1868.
Spain--Politics and government--1833-1868.