Dangos 7 canlyniad
Disgrifiad archifol- P1/81
- Ffeil
- 1973-1981
- P1/71
- Ffeil
- 1966-1981
Ffyrdd a thrafnidiaeth/Roads and transport
- P1/52
- Ffeil
- 1977
Ffyrdd a thrafnidiaeth/Roads and transport
- P1/51
- Ffeil
- 1976
Ffyrdd a thrafnidiaeth/Roads and transport
- P1/50
- Ffeil
- 1975
Ffyrdd a thrafnidiaeth/Roads and transport
- P1/49
- Ffeil
- 1971-1974