"Report ref. no. 06/WM18/1"--Vol. 1, front cover.
"Report ref. no. 06/WM18/2"--Vol. 2, front cover.
v. 1 Non-technical overview
v. 2 Guidance
DOMS guidance manual by George Heywood. ISBN 1840574070. Published by UK Water Industry Research in 2006. Publication and catalogue information, links to buy online and reader comments.