Ayres, Frank Theory and problems of plane and spherical trigonometry / Frank Ayres. - 1a ed. - New York : Schaum publishing co., 1954 - 207 p. : il. ; 28 cm. - Schaum´s outline series . Incluye índice Subjects--Topical Terms: Trigonometria esferica Trigonometria plana LC Class. No.: QA531 / A97 1954