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 -