000 00262nam a2200109Ia 4500
008 160710s1971 xx 000 0 und d
100 _aGAGG,J.B.
245 _aADVANCES IN ECOLOGICAL RESEARCH
260 _bACADEMIC PRESS
_c1971
300 _a254
942 _2ddc
_cB
999 _c38809
_d38809