Johnson, Roger A. Advanced euclidean geometry : an elementary treatise on the geometry of the triangle and the circle / by Roger A. Johson ; under the editorship of John Wesley Young - 1st ed. - New York : Dover, 1960 - xiii, 319 p. ; gráf., il. Subjects--Topical Terms: MATEMATICASGEOMETRIAGEOMETRIA EUCLIDEACIRCULOS[GEOMETRIA] Subjects--Index Terms: TRIÁNGULOS[GEOMETRIA] Universal Decimal Class. No.: 513.1