Bormann, Peter Exercises, New Manual of Seismological Observatory Practice (NMSOP), Deutsches GeoForschungsZentrum;
http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:43268 (Publisher version)
EX_3.1_rev1.pdf (Publisher version), 160KB
Bormann, P. (2009 online): Magnitude determinations. - In: Bormann, P. (Ed.), New Manual of Seismological Observatory Practice (NMSOP), Potsdam : Deutsches GeoForschungsZentrum GFZ, 1-8.https://doi.org/10.2312/GFZ.NMSOP_r1_EX_3.1