Zürn, Walter Information Sheets, New Manual of Seismological Observatory Practice 2 (NMSOP2), Deutsches GeoForschungsZentrum;
IS_5.1_rev1.pdf (Publisher version), 192KB
Zürn, W. (2012): Strainmeters. - In: Bormann, P. (Ed.), New Manual of Seismological Observatory Practice 2 (NMSOP-2), Potsdam : Deutsches GeoForschungsZentrum GFZ, 1-11.https://doi.org/10.2312/GFZ.NMSOP-2_IS_5.1