Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) AKAMATU Kei,On Microtremors,Zisin (Journal of the Seismological Society of Japan. 2nd ser.),00371114,SEISMOLOGICAL SOCIETY OF JAPAN,1956,9,1,21-39,https://cir.nii.ac.jp/crid/1390282679283953408,https://doi.org/10.4294/zisin1948.9.1_21