000 00254nam a2200109Ia 4500
008 160710s1935 xx 000 0 und d
100 _aDUREL C.V & WRIGHT ROU
245 _aELEMENTARY TRIGNOMETRY
260 _bBELL
_c1935
300 _a288
942 _2ddc
_cB
999 _c4452
_d4452