Columbia subject headings:
Albertus, Magnus, Saint, 1193?-1280.
Geyer, Bernhard, 1880-1974.
Harvard subject headings:
Albertus, Magnus, Saint, 1193?-1280.
Geyer, Bernhard, 1880-
Princeton subject headings:
Albertus, Magnus, Saint, 1193?-1280.
Geyer, Bernhard, 1880-1974.