"rutledge, wiliam a. "
modern trigonometry: / wiliam.a. rutledge - 2 ed. - uk : prentice-hal 1961. - "xii, 242p.; 22 cm."
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514. rut
modern trigonometry: / wiliam.a. rutledge - 2 ed. - uk : prentice-hal 1961. - "xii, 242p.; 22 cm."
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514. rut