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Sauer (1925) saw the terrestrial scene as more than a natural arena for human action. He recognized the repeated human impact on a living earth which created an ever-changing stage of landscape. Geographical conceptions of landscape have changed in the intervening 75 years. Today, geographers acknowledge the historically contingent qualities of nature and society and their inter-relationships (Zimmerer 1994).
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William Gustav Gartner (1999) studied this question.
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