000 00354nam a2200157Ia 4500
008 170101s1972 xx 000 0 und d
082 _a574.52 E41C
100 _aENHRENFELD, David W
245 0 _aConserving life on earth
250 _aRev.ed
260 _bN.Y
_c1972
300 _a360p
650 _aECOLOGY
653 _aECOLOGY
942 _2ddc
_cB
999 _c51007
_d51007