Trigonometry - Rees, Dorothy. 4 0 16; 1902- Rees, Paul Klein; 5 (Englewood Cliffs, N.J. : Prentice-Hall, 1965)
Reprint. Quezon City, Philippines : KEN, 1980.
Keywords: 2 -- 0; 6; Trigonometry. -- 20; 20; 2