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An Elementary Treatise on Cross-Ratio Geometry: With Historical Notes/en-ca/an-elementary-treatise-on-cross-ratio-geometry-with-historical-notes/6A818BB9-82FB-4593-98E4-F53A40F4AB23.html6A818BB9-82FB-4593-98E4-F53A40F4AB23
An Elementary Treatise on Cross-Ratio Geometry: With Historical Notes