000 00263nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aR S Dahiya/ A D Gupta
245 0 _aHigher trigonometry
260 _aNew Delhi
_bLaxmi Pub
_c1984
650 _aMath
942 _cBK
999 _c4824
_d4824