
Jones, David Watkin Yr Ysgol Farddol: Yn Cynnwys Cyfarwyddiadau Eglur I Ddeall Rheolau Barddoniaeth Cymreig, Gan Dafydd Morganwg

Jones, Howard Algernon 1898- The Reduction of Copper Oxide by Carbon Monoxide and the Catalytic Oxidation of Carbon Monoxide in Presence of Copper and of Copper Oxide

Watkin-Jones, Howard The Holy Spirit in the Mediaeval Church: A Study of the Christian Teaching Concerning the Holy Spirit and His Place in the Trinity from the Post-Patristic Age to the Counter-Reformation