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Geometry: The Line and the Circle (PDF) is an undergraduate textbook with a strong narrative that is written at the appropriate level of rigor for an upper-level survey or axiomatic course in geometry. Starting with Euclid’s Elements, the ebook connects topics in non-Euclidean and Euclidean geometry in an intentional and
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Introduction to Geographic Information Systems 9th edition (PDF) eBook is designed to provide college students in a first or second Geographic Information Systems (GIS) course with a solid foundation in both GIS concepts and the use of GIS. Introduction to GIS 9e PDF strikes a careful balance between GIS concepts