Y pum mlynedd cyntaf
Subtitle: I Ionawr 1976 tan 31 Mawrth 1981
By: Awdurdod Datblygu Cymru.
Publisher: Awdurdod Datblygu Cymru
Published: 1981
Place of publication: Pontypridd (Treforest Industrial Estate, Pontypridd, Mid Glamorgan CF37 5UT)
Language: eng
Number of pages: 24
Subjects: Welsh Development Agency -- History.
Notes: Also available in English as The first five years.