Ayres, F. (1954). Schaum's Outline of Theory and Problems of Plane and Spherical Trigonometry. New York: McGraw-Hill.
Styl ChicagoAyres, Frank. Schaum's Outline of Theory and Problems of Plane and Spherical Trigonometry. New York: McGraw-Hill, 1954.
Citace podle MLAAyres, Frank. Schaum's Outline of Theory and Problems of Plane and Spherical Trigonometry. New York: McGraw-Hill, 1954.
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