000 00375nmm a2200133Ia 4500
008 230125s9999||||xx |||||||||||||||||und||
020 _a9780817644321
100 _aTitu Andreescu, Zuming Feng
245 0 _a103 Trigonometry Problems
250 _a2005
260 _bBirkhäuser Boston
_c2005
650 _aMathematics and Statistics
856 _uhttps://doi.org/10.1007/b139082
999 _c3949
_d3949