'A Non-resonant Loudspeaker Enclosure Design - using acoustic transmission line with low-pass filter characteristic' by A.R. Bailey. Published in Wireless World, October 1965.
'The Transmission-line Loudspeaker - A re-examination of the general principle and a suggested new method of construction' by A.R. Bailey. Published in Wireless World, May 1972.
'High quality book-shelf speaker - An infinite baffle design using two drive units' by J. H. Wilkinson, Independent Broadcasting Authority. Published in Wireless World, October 1977.
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