Willemann, Raymond J. Information Sheets, New Manual of Seismological Observatory Practice 2 (NMSOP2), Deutsches GeoForschungsZentrum;
IS_10.1_rev1.pdf (Publisher version), 25KB
Willemann, R. J. (2012): Data-Type Bulletin IMS1.0: Short. - In: Bormann, P. (Ed.), New Manual of Seismological Observatory Practice 2 (NMSOP-2), Potsdam : Deutsches GeoForschungsZentrum GFZ, 1-7.https://doi.org/10.2312/GFZ.NMSOP-2_IS_10.1