Columbia subject headings:
Harvard subject headings:
Botanical gardens--Spain--Madrid--History--19th century.
Botanical gardens--Spain--Madrid.
Botany--Spain--Madrid.
Botany--Study and teaching (Higher)--Spain--Madrid--History--19th century.
Real Jardín Botánico (Spain)--History.
Science--Spain--Madrid--History--19th century.
Spain--History--19th century.
Princeton subject headings:
Botanical gardens--Spain--Madrid.
Real Jardín Botánico (Spain)--History.
Science--Spain--Madrid--History--19th century.