Books by International Association of Seismology and Physics of the Earth's Interior. Working Group on Magnitudes of Near Earthquakes:
Books in the extended shelves:
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International Association of Seismology and Physics of the Earth's Interior. Working Group on Magnitudes of Near Earthquakes: Survey of practice in determining magnitudes of near earthquakes (World Data Center A for Solid Earth Geophysics, NOAA, 1900), also by R. D. Adams (page images at HathiTrust)
Find more by International Association of Seismology and Physics of the Earth's Interior. Working Group on Magnitudes of Near Earthquakes at your library, or elsewhere.