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Evaluation of Sampling Methods Used to Estimate Irrigation Pumpage in Chase, Dundy, and Perkins Counties, Nebraska

出版	U.S. Department of the Interior, Geological Survey, 1986
URL	http://books.google.com.hk/books?id=qim6wWj8zXoC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN