Arian i bawb : hanes y bunt Gymraeg /
Jones, Ivor Wynne.
Cwmni y Ddafad Ddu Gymreig.
Llandudno : Cwmni y Ddafad Ddu Gymreig Ltd.,
1969.
Originally published (B69-13367) as 'Money for all', 1969.
Williams, Richard Hugh.
Banks and banking
Paper money