Room, T. G. A problem in projective geometry. (English) Zbl 0121.37501 Math. Gaz. 44, 245-250 (1960). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:foundations of geometry, non-Euclidean geometry × Cite Format Result Cite Review PDF Full Text: DOI