Plane and spherical trigonometry and tables - Wentworth, George, 1868; Smith, David Eugene, 1860-1944 (Boston : Ginn and Company, 1914)
Transparent protractor in pocket mounted on lining-paper.
With answers.
Tables have special t.-p.: Trigonometric and logarithmic tables, by George Wentworth and David Eugene Smith. Boston, New York etc. Ginn and company c1914
Keywords: Trigonometry