@conference{hatakeyama1975development, title = {Development of a Loudspeaker System with Omnidirectional High Polymer Tweeters}, author = {Hatakeyama, Koji and Kinoshitam, Shozo and Haeno, Akira and Asanuma, Tadaatsu}, booktitle = {Audio Engineering Society Convention 52}, month = {Oct}, year = {1975}, url = {https://www.aes.org/e-lib/browse.cfm?elib=2376} }