“Front Matter.” Exploring Advanced Euclidean Geometry with GeoGebra, by Gerard A. Venema, 1st ed., Mathematical Association of America, 2013, pp. i-vi, www.jstor.org/stable/10.4169/j.ctt5hh9ht.1. Accessed 27 July 2021.
Venema, G. (2013). Front Matter. In Exploring Advanced Euclidean Geometry with GeoGebra (pp. I-Vi). Mathematical Association of America. Retrieved July 27, 2021, from http://www.jstor.org/stable/10.4169/j.ctt5hh9ht.1
Venema, Gerard A. "Front Matter." In Exploring Advanced Euclidean Geometry with GeoGebra, I-Vi. Mathematical Association of America, 2013. Accessed July 27, 2021. http://www.jstor.org/stable/10.4169/j.ctt5hh9ht.1.
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