Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kimura Syo,9) SOUND ABSORBING CHARACTERISTICS OF PERFORATED PANEL ABSORBENTS WITH POROUS MATERIALS HAVING DIFFERENT FLOW RESISTANCES,Transactions of the Architectural Institute of Japan,03871185,Architectural Institute of Japan,1960,64,0,59-67,https://cir.nii.ac.jp/crid/1390282680546141312,https://doi.org/10.3130/aijsaxx.64.0_59