TY  - BOOK
AU  - Ortiz, Luz D.
TI  - Trigonometry
SN  - 971-719-171-9.
U1  - Fil. 516.24 Or78 2002 
PY  - 2002///
CY  - Marikina City : 
PB  - ICS Publishing, Inc., 
KW  - 1. Trigonometry-Textbooks
N1  - Includes bibliographical references and index
ER  -