Columbia subject headings:
Netherlands--Church history--17th century--Sources.
Poland--Church history--17th century--Sources.
Socinianism--Poland--History--Sources.
Unitarianism--Netherlands--History--Sources.
Unitarianism--Poland--History--Sources.
Harvard subject headings:
Netherlands--Church history--17th century--Sources.
Poland--Church history--17th century--Sources.
Socinianism--History--Sources.
Socinianism--Poland--History--Sources.
Unitarianism--Netherlands--History--Sources.
Unitarianism--Poland--History--Sources.
Princeton subject headings:
Socinianism--History--Sources.
Unitarianism--Netherlands--History--Sources.
Unitarianism--Poland--History--Sources.