Rice, Bernard J.
Plane trigonometry
Prindle, Weber & Schmidt, 1975
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Cameron, Edward A.
Brief trigonometry
Reynal & Hitchock, 1941
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Buchanan, Herbert E.
Plane trigonometry
Johnson Pub., 1926
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Kuechle, Richard T.
Trigonometry : a New approach
Wadsworth, 1984
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Brink, Raymond
Plane trigonometry / Raymond Brink
D. Appleton-Century Co., 1940
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