000 00281nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aKenneth E.F.Walt
245 0 _aSystems analysis in ecology
260 _bAcademic press
260 _c1966
365 _b91.88
942 _cBK
999 _c197715
_d197715