00363nam a2200145Ia 4500008004100000020001500041082001500056100001900071245001800090260004900108300000800157650002000165650001400185653001800199170901s1975    xx            000 0 und d  a0260400027  a301.3bI5P  aKnotig, Helmut 0aHuman Ecology  aSwitzerlandbGeorgi Publishing Companyc1975  a341  aSocial sciences  aSociology  aHuman ecology