TY - BOOK AU - Ayres, Frank . TI - Theory and Problems of Plane and Spherical Trigonometry U1 - 514.6 PY - 1954/// CY - New York PB - Schaum Publishers Co. KW - Trigonometry KW - Plane Trigonometry KW - Spherical Trigonometry KW - G-Mathematics N1 - Index ER -