Ayres, Frank, 1901- Schaum's outline of theory and problems of plane and spherical trigonometry / by Frank Ayres, Jr. - New York : McGraw-Hill, c1954. - 207 p. - Schaum's outline series . Na capa: Including 680 solved problems completely solved in details. Subjects--Topical Terms: Trigonometria. Dewey Class. No.: 516.24