000 00270nam a22001217a 4500
008 180919b xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a510
100 _a36
101 _aMAT
245 _aTrigonometry for Secondary Schools
_cButler
942 _2udc
_cBK
999 _c48076
_d48076