000 00258nam a2200097Ia 4500
008 171204s9999 xx 000 0 und d
245 _aTrigonometry:
260 _c2016
650 _xG-MATH2 Trigonometry
856 _uhttp://down.ebook777.com/052/B01N02XOB2.pdf
999 _c345506
_d345506