UNITED STATES ARMED FORCES INSTITUTE, MADISON, WIS.
Examination in EM318, Plane and spherical trigonometry. Book I, section I: Plane trigonometry. By Examinations Staff, Ralph W. Tyler, director.
UNITED STATES ARMED FORCES INSTITUTE, MADISON, WIS. Examination in EM318, Plane and spherical trigonometry. Book I, section I: Plane trigonometry. By Examinations Staff, Ralph W. Tyler, director. © 16Feb45; AA6942. Educational Testing Service (PWH); 22Aug72; R534772.
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