BELL, Robert J.T. An elementary treatise on coordinate geometry of three dimensions / by Robert J.T.Bell - 3rd ed. - London Macmillan 1954 - xviii, 377 p. Appendix: p. A1-A43; Index: p. I45-I48 Subjects--Topical Terms: Coordinate geometry Dewey Class. No.: 516.1 / BEL