Hobson, E. W.
Treatise on plane and advanced trigonometry - 7th ed. - New York Dover Publications 1957 - xv, 383 p. illus 21 cm.
Plane trigonometry
514.5 / HOB/1957
Treatise on plane and advanced trigonometry - 7th ed. - New York Dover Publications 1957 - xv, 383 p. illus 21 cm.
Plane trigonometry
514.5 / HOB/1957