Columbia subject headings:
Hofer, Carl, 1878-1955--Catalogs.
Museum der Stadt Ettlingen--Catalogs.
Harvard subject headings:
Hofer, Carl, 1878-1955--Catalogs.
Hofer, Carl, 1878-1955--Exhibitions.
Museum der Stadt Ettlingen--Catalogs.
Schlossmuseum Ettlingen--Exhibitions.
Princeton subject headings:
Hofer, Carl, 1878-1955--Exhibitions.