000 00254nam a2200121Ia 4500
008 161008s9999 xx 000 0 und d
100 _aLARSON R.
245 _aTRIGONOMETRY
250 _a7th
260 _bHOUGHTON
_c2007
300 _a514
942 _cBK
999 _c44375
_d44375