- 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.
Metric system
Tacsonomeg
Cod
Nodyn(nodiadau) cwmpas
Nodyn(nodiadau) ffynhonnell
Nodyn(nodiadau) darganfod
Termau hierarchaidd
Metric system
Termau cyfwerth
Metric system
Termau cysylltiedig
Metric system
1 Disgrifiad archifol canlyniad ar gyfer Metric system
1 canlyniad yn uniongyrchol gysylltiedig Eithrio termau culach