Colombier, Mathieu, Mueller, Sebastian B., Kueppers, Ulrich, Scheu, Bettina, Delmelle, Pierre, Cimarelli, Corrado, Cronin, Shane J., Brown, Richard J., Tost, Manuela, Dingwell, Donald B., "Diversity of soluble salt concentrations on volcanic ash aggregates from a variety of eruption types and deposits", Bulletin of Volcanology, 2019