Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
National Coal Board Production Department
Diwydiant
Conveyor Belting Manual
Publisher: National Coal Board Production Department
(11/1963)
2017.29/12
Diwydiant
Man-riding Underground by Rope and Locomotive Haulage (booklet)
Publisher: National Coal Board Production Department
(1975)
2001.1/872
Diwydiant
Summaries of Technical Articles (list)
Publisher: National Coal Board Production Department
(07/1964)
2001.1/1061
Diwydiant
Summaries of Technical Articles (list)
Publisher: National Coal Board Production Department
(08/1964)
2001.1/1062
Diwydiant
Shunting Locomotives for Colliery Yards (booklet)
Publisher: National Coal Board Production Department
(1957)
2018.42/144
Diwydiant
Outlines of Underground Locomotives (booklet)
Publisher: National Coal Board Production Department
(1957)
2018.42/143
Diwydiant
Layering of Firedamp in a Mine Roadway (leaflet)
Publisher: National Coal Board Production Department
(1959)
2018.42/164
Diwydiant
Economising Timber Cage Guides (booklet)
Publisher: National Coal Board Production Department
(1950)
2018.42/10
Diwydiant
Servicing of Methanometers (leaflet)
Publisher: National Coal Board Production Department
(1950)
2018.42/26
Diwydiant
Compressed Air operated Tub Lifters or Back Shunters (booklet)
Publisher: National Coal Board Production Department
(1950)
2018.42/6
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.