Columbia subject headings:
Harvard subject headings:
Netherlands--Church history--20th century.
Reformed Church--Netherlands--Clergy.
World War, 1939-1945--Prisoners and prisons, Dutch.
World War, 1939-1945--Religious aspects--Christianity.
World War, 1939-1945--Underground movements--Netherlands
Princeton subject headings:
World War, 1939-1945--Underground movements--Netherlands.
World War, 1939-1945--War work--Churches.