ozawa i. On the Extensometer Whose Magnifier is a Zollner Suspension Type Tiltmeter, and the Observation of the Earth’s Strains by Means of the Instruments. Ann. Geophys. [Internet]. 1965Nov.25 [cited 2024Apr.27];18(3):263-78. Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5505