Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Treatment of Water For Marine Boilers (book)
Grey covered hard back book with title imprinted in black on cover and spine. Book has a section on Engineering Factors. 95 pages with drawn diagrams throughout.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.