TY  - BOOK
AU  - Dr. Mamhot, Millard R., author.
AU  - Mamhot, Millard R., author.
TI  - Plane and spherical trigonometry a tethrahedron approach
SN  - 9789719654056
AV  - Fil./516/M310/2015 
PY  - 2015///
CY  - Manila
PB  - Unlimited books Library Publishing
N1  - Includes Index, references
ER  -