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Manual of Seismological Observatory Practice

World Data Center A for Solid Earth Geophysics

出版	World Data Center A for Solid Earth Geophysics, U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Environmental Data and Information Service, 1979
URL	http://books.google.com.hk/books?id=UFFYAAAAMAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN