PPE testing

• Mueller, W., Horwell, C. J., Apsley, A., Steinle, S., McPherson, S., Cherrie, J. W., Galea, K. S., (2018), The effectiveness of respiratory protection worn by communities to protect from volcanic ash inhalation. Part I: Filtration efficiency tests, International Journal of Hygiene and Environmental Health, 221(6): 967-976, 10.1016/j.ijheh.2018.03.012