- 1Letter from Howard Rosenbrock to P. K. M'Pherson (PKM/E/01/07/03)
6th January 1967, item - 2Digital archive material relating to research carried out into the Virustatic Shield face covering (2021-1653/2)
2011-2020, series - 3Set of results documents (2021-1653/2/2)
14 October 2011-23 November 2020, sub-series - 4Report VS111014 University of Manchester Test report 2011 (2021-1653/2/2/1)
14 October 2011, item - 5Report VS130620 University of Manchester Test report 2013 (2021-1653/2/2/2)
20 June 2013, item - 6Report VS170112 University of Manchester Test report 2017 (2021-1653/2/2/3)
12 January 2017, item
