Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 加集 純一,Technology of Safety and Security for Emergency Public Address System,The Journal of the Institute of Electrical Installation Engineers of Japan,09100350,The Institute of Electrical Installation Engineers of Japan,2013,33,4,269-272,https://cir.nii.ac.jp/crid/1390282680722717952,https://doi.org/10.14936/ieiej.33.269