Thinking is form : the drawings of Joseph Beuys /
Temkin, Ann.
Rose, Bernice.
Koepplin, Dieter.
Philadelphia Museum of Art.
Museum of Modern Art (New York, N.Y.)
New York ; London : Thames and Hudson in association with Philadelphia Museum of Art and The Museum of Modern Art, New York,
1993.
Bibliography: p271-273
Beuys, Joseph.