000			00407nam a2200145Ia 4500
008			170101s1979 xx 000 0 und d
082			_a574.501 84 H14T
100			_aHALFON, Efraim
245		0	_aTheoretical systems ecology : advances and case studies
260			_bN.Y _c1979
300			_a516p
650			_aECOLOGY -- MATHEMATICAL MODELS
653			_aECOLOGY -- MATHEMATICAL MODELS
942			_2ddc _cB
999			_c76942 _d76942