Konkle, Gail S.
Shapes and perceptions : an intuitive approach to geometry / Gail S. Konkle
Prindle, Weber & Schmidt, 1974
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Byrne, J. Richard
Modern elementary geometry
McGraw-Hill, 1970
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Lathrop, Thomas G.
Geometry : a contemporary approach
Wadsworth, 1967
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Smart, James R.
Introductory geometry : an informal approach
Brooks/Cole Publishing, 1969
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Millman, Richard S.
Geometry : a metric approach with models
Springer-Verlag, 1981
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