Columbia subject headings:
Harvard subject headings:
Birth control--Poland.
Birth control--Spain.
Contraceptives--Poland--History--20th century.
Contraceptives--Spain--History--20th century.
Princeton subject headings:
Birth control--Poland--History--20th century.
Birth control--Spain--History--20th century.
Oral contraceptives--Social aspects--Poland--History--20th century.
Oral contraceptives--Social aspects--Spain--History--20th century.