- D/20
- Ffeil = File
- 1970
Rhan oJack Howells Papers
File contains correspondence and background information on a film for the National Coal Board on district heating and metrication.
Heating from central stations
Tacsonomeg
Cod
Nodyn(nodiadau) cwmpas
Nodyn(nodiadau) ffynhonnell
Nodyn(nodiadau) darganfod
Termau hierarchaidd
Heating from central stations
Termau cyfwerth
Heating from central stations
Termau cysylltiedig
Heating from central stations
1 Disgrifiad archifol canlyniad ar gyfer Heating from central stations
1 canlyniad yn uniongyrchol gysylltiedig Eithrio termau culach