http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Processes subject to integrated pollution control
"This IPC Guidance Note supersedes Her Majesty's Inspectorate of Pollution's Chief Inspector's Guidance Notes IPR 4/1 to IPR 4/4 and IPR 4/6 published by HMSO in 1993."--P.1.