TY  - BOOK
TI  - Theory, Practice and Techniques in Trigonometry 
SN  - 978-1-68094-905-6
U1  - Cir. 516.24 Th394 C2018 
PY  - 2018///
CY  - New York, USA: 
PB  - 3g E-learning LLC; 
ER  -