Wassermann, Joachim Chapters, New Manual of Seismological Observatory Practice (NMSOP), Deutsches GeoForschungsZentrum;
http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:43224 (Publisher version)
Chapter_13_rev1.pdf (Publisher version), 5MB
Wassermann, J. (2009 online): Volcano Seismology. - In: Bormann, P. (Ed.), New Manual of Seismological Observatory Practice (NMSOP), Potsdam : Deutsches GeoForschungsZentrum GFZ, 1-42.https://doi.org/10.2312/GFZ.NMSOP_r1_ch13