000 00271nam a2200121Ia 4500
008 161121s9999 xx 000 0 und d
100 _aMADDALA (GS)
245 0 _aLimited - dependent and qualitative vari
260 _cNIL
365 _b0
650 _aNIL
942 _cBK
999 _c89642
_d89642