Brink, R. W. (1928). Plane Trigonometry: A textbook for schools and colleges. D. Appleton - Century.
Chicago-čujuhus (17. p.)Brink, Raymond W. Plane Trigonometry: A Textbook for Schools and Colleges. New York: D. Appleton - Century, 1928.
MLA-čujuhus (9. p.)Brink, Raymond W. Plane Trigonometry: A Textbook for Schools and Colleges. D. Appleton - Century, 1928.
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