TY  - BOOK
AU  - Swokowski, Earl W.
TI  - Fundamentals of Trigonometry 
SN  - 0871802542
U1  - 516.24 
PY  - 1978///
CY  - Boston : 
PB  - Prindle Weber and Schmidt, 
KW  - Trigonometry Plane
N1  - NN
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-87180-254-2.pdf
ER  -