Ecological and conservation thought at the turn of the century was nearly all in what might be called closed systems of one kind or another. In all of them some kind of balance or near balance was to be achieved. The geologists had their peneplain; the...
A Little Corner of Freedom: Russian Nature Protection from Stalin to Gorbachev - 第 375 頁
Douglas R. Weiner 著 - 1999 - 570 頁