You can't smell it, you can't see it and it can kill! /
Wales.Welsh Assembly Government.
Wales.Welsh Assembly Government.You can't smell it, you can't see it and it can kill!
Wales.Welsh Assembly Government.Allwch chi mo'i arogli, allwch chi mo'i weld ond gall eich lladd!
Title from cover.
Includes errata slip.
Text in English and Welsh, bound back to back and inverted.
Carbon monoxide.