00355nam a2200121Ia 4500008004100000041000800041084001100049100002600060245005500086260005800141546001700199653001700216160807s1971    xx            000 0 mal d  amal  aB52CC  aRamachandra Menon, P.  aPre degree trikonamithy /cby P. Ramachandra Menon  aThiruvananthapuram :bKerala Bhasha Institute,c1971.  aIn Malayalam  aTrigonometry