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040 _aMAIN
041 _aEnglish
082 _a516.24
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100 _aKhanna,M L
245 0 _aSpherical Trigonometry
260 _bJai Prokash Nath & Co
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300 _bPBB
650 _aTrigomnometry
942 _cBK
999 _c6763
_d6763