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020 _c11
040 _aMAIN
041 _aEnglish
082 _a516.24
_bDAS
100 _aDas, B. C. and Mukherjee, B. N.
245 0 _aHigher trigonometry
250 _a18th ed.
260 _aCalcutta
_b; U. N. Dhur And Sons
300 _axvi,272p.
650 _aMathematics
650 _aTrigonometry
942 _cBK
999 _c111306
_d111306