Musson 2013, ss. 831-833. Musson, R. M. W. (2013), "A history of British seismology", Bulletin of Earthquake Engineering, cilt 11, ss. 715-861, doi:10.1007/s10518-013-9444-5.
In a 2008 document 27 Eylül 2022 tarihinde Wayback Machine sitesinde arşivlendi. the U.S. Geological Survey said "it is because of the ISC's authoritative role that the USGS continues to refer to its final bulletin publication as 'preliminary'.
In a 2008 document 27 Eylül 2022 tarihinde Wayback Machine sitesinde arşivlendi. the U.S. Geological Survey said "it is because of the ISC's authoritative role that the USGS continues to refer to its final bulletin publication as 'preliminary'.