000 00271nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aR S Dahiya
245 0 _aComprehensive course in plane trigonometry
260 _aDelhi
_bLaxmi Pub
_c1979
650 _aMath
942 _cBK
999 _c3930
_d3930