00329nam a2200133Ia 4500008004100000082001600041100001800057245003200075260003300107300000700140650001800147650001800165653001200183170901s1969    xx            000 0 und d  a574.5bS38B  aShepley, A.V. 0aBasic Approaches to Ecology  aOxfordbPergamon Pressc1969  a56  aLife sciences  aPure Sciences  aEcology