000 00309nam a2200121Ia 4500
008 180413s9999 xx 000 0 und d
100 _aWitmer Jeffrey A
245 0 _aData Analysis An Introduction
260 _bWashington D.C. : World Bank 1997.
300 _a115
546 _aEng
690 _aData Analysis.
999 _c24339
_d24339