Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
A Simple Explanation (booklet)
Full title - A Simple Explanation of the Wilson Epicyclic Gearbox. 8 page booklet, stapled at centre.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.