Canllaw ar wybodaeth gefndir i'r rhoi gyda hysbysiadau o dan adran 14(1) o Ddeddf Ynny 1976 a hysbysiadau o dan adran 36 o Deddf Trydan 1989.
Great Britain.Department of Trade and Industry.
[London?] : [Department of Trade and Industry?],
2001.
Caption title.