Arolwg of [sic.] lefelau nitrogen diocsid ar hyd cefnffordd yr A5, Mai 1995-Mai 1996 =
Subtitle: Survey of nitrogen dioxide levels along the A5 trunk road, May 1995-May 1996.
Publisher: Cyfarwyddwr Gwarchod y Cyhoedd Cyngor Sir Ynys Môn = Anglesey County Council Director of Public Protection; 1997.
Published: 1997
Place of publication: Llangefni
Language: eng
Number of pages: 20
Other titles: Survey of nitrogen dioxide levels along the A5 trunk road, May 1995-May 1996.
Notes: Parallel Welsh and English text.