TY  - BOOK
AU  - Mamhot,Millard R.
TI  - Plane and spherical trigonometry : a tetrahedron approach
SN  - 9789719654056
PY  - 2015///
CY  - Philippines 
PB  - Unlimited Books Library Services & Pub.
KW  - Trigonometry, Plane
KW  - Trigonometry, Spherical
ER  -