TY  - BOOK
TI  - Plane & spherical trigonometry : a tetrahedron approach
SN  - 978-9-71965405-6
U1  - F 516.24 P7121 2015 
PB  - Unlimited Books Library Services & Publishing Inc.
KW  - Trigonometry
N1  - 500 Natural Sciences & Math
ER  -