TY  - BOOK
AU  - Deauna, Melecio C. 
AU  -  Lamayo, Florita C.
TI  - Basic trigonometry for secondary schools
SN  - 9717910391
U1  - 516.24 D349 23
PY  - 2002///
CY  - Quezon City, Philippines
PB  - SIBS Publishing House, Inc., 
KW  - Trigonometry
N1  - Includes bibliographical references and index; HS
ER  -