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The First 20 Years of CALNET, the Northern California Seismic Network

David H. OppenheimerFred W. KleinJerry P. Eaton

出版	Department of the Interior, U.S. Geological Survey, 1992
URL	http://books.google.com.hk/books?id=nDRTXwAACAAJ&hl=&source=gbs_api