Columbia subject headings:
Architecture--Spain--Madrid--History--20th century.
Buildings, Temporary--Spain--Madrid--History--20th century.
Casa de Campo (Madrid, Spain)--Buildings, structures, etc.
Exhibition buildings--Spain--Madrid--History--20th century.
Feria del Campo--Buildings.
Feria del Campo--History.
Recinto Ferial de la Casa de Campo (Madrid, Spain)--History.
Harvard subject headings:
Architecture--Spain--Madrid--History.
Buildings, Temporary--Spain--Madrid--History--20th century.
Casa de Campo (Madrid, Spain)--Buildings, structures, etc.
Exhibition buildings--Spain--Madrid--History--20th century.
Feria del Campo--Buildings.
Feria del Campo--History.
Recinto Ferial de la Casa de Campo (Madrid, Spain)--History.
Princeton subject headings:
Architecture--Spain--Madrid--History--20th century.
Buildings, Temporary--Spain--Madrid--History--20th century.
Casa de Campo (Madrid, Spain)--Buildings, structures, etc.
Exhibition buildings--Spain--Madrid--History--20th century.
Feria del Campo--Buildings.
Feria del Campo--History.
Recinto Ferial de la Casa de Campo (Madrid, Spain)--History.