Columbia subject headings:
Early printed books--17th century--Union lists.
Spanish imprints--Union lists.
Union catalogs--Spain.
Harvard subject headings:
Early printed books--17th century--Union lists.
Early printed books--Spain--17th century--Bibliography--Union lists.
Spanish imprints--Union lists.
Union catalogs--Spain.
Princeton subject headings:
Early printed books--17th century--Union lists.
Spanish imprints--Union lists.
Union catalogs--Spain.
Union catalogs.