Keith, Thomas. irp9-1924.
An introduction to the theory and practice of plane and spherical trigonometry, and the orthographic and stereographic projections of the sphere; including the theory of navigation. London: the author. 1801. xv, (1), 414 pp. 8°.
**E.196.14 Samee 2d ed. Longman, Hurst, Rees, Orme & Brown. 1810. xiii, 420 pp. Diagrams. E.196.30
-Navigation.- re Trigonometry.
-Pro jection.