Columbia subject headings:
Crematoriums--Germany--Design and construction.
Crematoriums--Germany--Hagen--History.
Crematoriums--Germany--Prussia--History.
Harvard subject headings:
Behrens, Peter, 1868-1940
Cremation--Germany--Hagen (Arnsberg)--History.
Cremation--Germany--Prussia--History.
Crematoriums--Germany--Hagen (Arnsberg)--History.
Crematoriums--Germany--Prussia--History.
Princeton subject headings: