Journal article published in 2004 by Keith Shortridge, Horst Meyerdierks, Malcolm Currie , Chris Clayton, Jon Lockley, Anne Charles, Clive Davenhall, Mark Taylor, Tim Ash, Tim Wilkins, Dave Axon, John Palmer, Anthony Holloway, Vito Graffagnino, Alan Bridger and other authors. Keith Shortridge, Horst Meyerdierks, Malcolm Currie , Chris Clayton, Jon Lockley, Anne Charles, Clive Davenhall, Mark Taylor, Tim Ash, Tim Wilkins, Dave Axon, John Palmer, Anthony Holloway, Vito Graffagnino, Alan Bridger, N. M. Fuller

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