E. W. Kornfeld, Paul Klee Verzeichnis des graphischen Werkes, Kornfeld & Klipstein, Berne, 1963, reproductions, from the German edition of 1,400 (the total edition was 2,500), original linen boards, paper wrapper, 320 x 260 mm.; J. Glaesemer, Paul Klee Handzeichnungen I Kindheit bis 1920, Kunstmuseum, Berne, 1973; and nine others on Klee (11)