TY  - BOOK
AU  - Kells, Lyman M.
AU  - Kern, Willis F.
AU  - Bland, James R.
TI  - Plane and spherical trigonometry
SN  - 971-08-1917-8
U1  - 516.24 K29 1978 
PY  - 1978///
CY  - [Mandaluyong City]
PB  - National Book Store, [distributor]
KW  - Trigonometry
N1  - Originally published: McGraw-Hill, 1951
ER  -