Musson, Roger M. W. Chapters, New Manual of Seismological Observatory Practice (NMSOP), Deutsches GeoForschungsZentrum;
http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:43219 (Publisher version)
Chapter_12_rev1.pdf (Publisher version), 765KB
Musson, R. M. W. (2009 online): Intensity and Intensity Scales. - In: Bormann, P. (Ed.), New Manual of Seismological Observatory Practice (NMSOP), Potsdam : Deutsches GeoForschungsZentrum GFZ, 1-20.https://doi.org/10.2312/GFZ.NMSOP_r1_ch12