Your query returned 2 results.

• Measuring Acceleration of Ballast Particles at Track Level,
  D. Milne, L.M. Le Pen, G. Watson, D.J. Thompson, W. Powrie, M. Hayward and S. Morley
  Paper 1.8 from CCP: 110, ISBN 978-1-905088-65-2 (2016)
  
• Resin Recovery and the use of Computed Tomography for Quantitative Image Analysis of Railway Ballast,
  L. Le Pen, S. Ahmed, A. Zervos J. Harkness and W. Powrie
  Paper 7.130 from CCP: 104, ISBN 978-1-905088-59-1 (2014)