Plane and spherical trigonometry /
Kells, Lyman M.
Plane and spherical trigonometry / Lyman M. Kells, James R. Bland. - 3rd edition. - New York : McGraw-Hill Book Company, Incorporated, c1978. - ix, 290 pages : Illustration ; 22 cm.
Trigonometry.
Plane and spherical trigonometry / Lyman M. Kells, James R. Bland. - 3rd edition. - New York : McGraw-Hill Book Company, Incorporated, c1978. - ix, 290 pages : Illustration ; 22 cm.
Trigonometry.