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Attitudes of Professional Foresters Toward the Use of Forest Lands for Outdoor Recreation

其他書名	A Thesis Submitted in Partial Fulfillment ... for the Degree of Master of Forestry ...
出版	University of Michigan, 1972
URL	http://books.google.com.hk/books?id=_ZFh8e_H-akC&hl=&source=gbs_api