Columbia subject headings:
Harvard subject headings:
Bachem Verlag--History.
Bachem family.
Publishers and publishing--Germany--Cologne--History.
Publishers and publishing--Germany--History.
Princeton subject headings:
Bachem Verlag--History.
Bachem family.
Catholic press--Germany--Cologne--History--19th century.
Catholics--Political activity--Germany--Cologne.
Journalists--Germany--Cologne--Biography.