000 00261nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aHarswaroop Sharma/ S S Seth
245 0 _aTrigonometry
260 _aAgra
_bShivlal & Co.
_c1969
650 _aMath
942 _cBK
999 _c2709
_d2709