Columbia subject headings:
Drawing, Swiss--20th century.
Engraving, Swiss--20th century.
Müller, Alfredo, 1869-1939--Catalogues raisonnés.
Harvard subject headings:
Princeton subject headings:
Catalogues raisonnés.
Müller, Alfredo, 1869-1939--Catalogues raisonnés.
Müller, Alfredo, 1869-1939.