000 00300nam a2200121Ia 4500
999 _c17572
_d17572
020 _a047127626X
100 _aYvo M I Dirickx
245 _aSystems Analysis by Multilevel Methods
260 _c1979
_bJOHN WILEY & SONS
_aChichester
300 _axi+217
700 _aPeter Jennergren L
942 _cREF