TYLER, RALPH W.
Plane trigonometry, college level. CPTr-1-A-3 & CPTr-1-B-3. By Ralph W. Tyler & others.
TYLER, RALPH W. Plane trigonometry, college level. CPTr-1-A-3 & CPTr-1-B-3. By Ralph W. Tyler & others. © 20Apr43, AA438299; 20May43, AA438300. Educational Testing Service (PWH); 24Feb71; R501580-501581.
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