-
1LlyfrCyhoeddwyd 1969“...Institute of Information Scientists (Great Britain). Northern Branch...”
-
2LlyfrCyhoeddwyd 1969“...Institute of Information Scientists (Great Britain)...”
-
3LlyfrCyhoeddwyd 1968“...Institute of Information Scientists (Great Britain)...”
-
4CylchgrawnCyhoeddwyd 1979“...Institute of Information Scientists (Great Britain)...”