TY  - BOOK
AU  - Kells, Lyman M
AU  - James R Bland
AU  - Willis F Kern
TI  - Plane trigonometry^ien
U1  - ECO 514 
PY  - 1942///
CY  - Nueva York
PB  - McGraw-Hill
KW  - Matemáticas
KW  - Libros de Texto
N1  - Incluye appendix; Trigonometric functions of an cute angle, fundamental relations among the trigonometric functions, right triangles
ER  -