Spiral bound.
"Prepared for: project record: 387(387)HTRL acoustic durability of noise barriers over time. Client: Highways Agency, Research and Development (Pam Lowery)."
Technical annex to PPR490 : the acoustic durability of timber noise barriers on England's strategic road network by P. A. Morgan. ISBN 9781846088841. Published by IHS in 2010. Publication and catalogue information, links to buy online and reader comments.