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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Stubblefield, Beauregard
An intuitive approach to elementary geometry
California Brooks, 1969
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Millman, Richard S.
Geometry : a metric approach with models
Springer-Verlag, 1981
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Kappraff, Jay
A Participatory Approach to Modern Geometry
World Scientific, 2015
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