000 00289nam a2200121Ia 4500
008 190719s9999 xx 000 0 und d
100 _aO S Yadav/ S L Aggarwal
245 0 _aEasyway trignometry
250 _a1st
260 _aRohtak
_bRamakrishna Pub.
_c1983
650 _aMath
942 _cBK
999 _c4444
_d4444