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Conservation of Nature

Eric Duffey

出版	Collins, 1970
主題	Juvenile Nonfiction / Science & Nature / Environmental Conservation & Protection
ISBN	00010012059780001001206
URL	http://books.google.com.hk/books?id=1hMhAQAAIAAJ&hl=&source=gbs_api

註釋

Describes how man through farming, industry, clearance of forests, and population growth began to change the earth and bring about critical shortages of natural resources.