@article{volkmann1968360deg, title = {360° Conical Wavefront Loudspeaker for New York World's Fair}, author = {Volkmann, John E. and Morgan, Adolph R. and Olson, Harry F.}, journal = {J. Audio Eng. Soc}, volume = {16}, number = {2}, pages = {130--135}, year = {1968}, url = {https://www.aes.org/e-lib/browse.cfm?elib=1663} }