Smith, Charles . An Elementary Treatise on Conic Sections By The Methods of Co-Ordinate Geometry / Textual Documents Charles Smith. - 1st ed. / - New York : Macmillan and co , 1882. - 447p. : ill ; 18cm . ISBN: HB Subjects--Index Terms: Co-Ordinate Geometry Geometry G-Mathematics Dewey Class. No.: 515.56 / Sm 53 El