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Freemish Crate


An Impossible Figure box which can be drawn but not built.


Fineman, M. The Nature of Visual Illusion. New York: Dover, p. 120-122, 1996.

Jablan, S. ``Are Impossible Figures Possible?''

Pappas, T. ``The Impossible Tribar.'' The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, p. 13, 1989.

© 1996-9 Eric W. Weisstein