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Ives, Howard Chapin. **F,.5123.55 Natural trigonometric functions to seven decimal places for every ten seconds of arc, together with miscellaneous tables. — New York. John Wiley & Sons, Inc. 1931. (7), 329 pp. Dia- grams. Tables. 25 cm.
Trigonometry-Tables, a: -—Trigonometrical  fPnstions—r.r.