000 00314nam a2200121Ia 4500
008 250224s9999 xx 000 0 und d
020 _a9780123747303
082 _a005.756HAR
100 _aWhitaker
245 0 _aReference and information services in tghe 21st century
260 _bElsevier
_c2009
942 _cBK
999 _c457535
_d457535