Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kato Yasumasa and Abe Tomigoro and Hiraiwa Shozo,Multiple Synchronous Locking Device using Radio Broadcasting Wave,The Journal of the Institute of Television Engineers of Japan,03743470,The Institute of Image Information and Television Engineers,1967,21,3,183-188,https://cir.nii.ac.jp/crid/1390001205395766272,https://doi.org/10.3169/itej1954.21.183