000 00254nam a2200109Ia 4500
008 190829s9999||||xx |||||||||||||| ||und||
100 _aKrishnamurthy, V
245 0 _aTrigonometry
260 _bNational
_aMadras
_c1957
650 _aMathematics
942 _cBK
999 _c9229
_d9229