"This booklet is based on a report produced by the Public Health Laboratory Service and funded by the Department of the Environment (DOE contract 7/7/424)."
An evaluation of presence-absence tests for coliform organisms and escherichia coli 1996 : methods for the examination of waters and associated materials. ISBN 9780117532434. Published by HMSO in 1996. Publication and catalogue information, links to buy online and reader comments.