Plane trigonometry, a new approach - Johnston, C. L. 1911- 4 0 (Carol Lee),16; 1932- Lazaris, Jeanne; 5 (Englewood Cliffs, N.J. : Prentice Hall, 1991)
Includes index.
Keywords: 2 -- 0; 6; Plane trigonometry. -- 20; 20; 2