TY  - BOOK
AU  - Smith, Karl J.
TI  - Essentials of Trigonometry 
SN  - 0534052746
U1  - 516.24 
PY  - 1986///
CY  - Monterey : 
PB  - Brooks/Cole Publishing, 
KW  - Trigonometry
N1  - NY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-534-05274-6.pdf
ER  -