1.
Johnson B. Philip Tagg. ‘Scotch Snaps: The Big Picture’. Online video documentary located at http://www.youtube.com/watch?v=3BQAD5uZsLY and also http://tagg.org/ptavmat.htm (1 hour 15 mins). PB. 2013;14(1):86-87. doi:10.1558/prbt.v14i1.86