Translated from the English.
"NMA/TR/2009/03."
"LIT 7810"--Back cover.
Astudiaeth o Ansawdd Aer Amgylchynol yn Aberddawan : 14 Tachwedd 2008 - 7 Mai 2009 : Prif Adroddiad Mehefin 2009. Published by Asiantaeth yr Amgylchedd in 2011. Publication and catalogue information, links to buy online and reader comments.