lower right in graphite below image: M.C.Escher.; lower left in plate: ME
- M.C. Escher: Landscape to Mindscape, National Gallery of Canada, Ottawa, 1995-1996, no.2.
- Bool, F.H. et al. M.C. Escher: His Life and Complete Graphic Work. Amsterdam: Meulenhoff, 1981; English-language edition, New York: Harry N. Abrams, 1982.