- NLW ex 1689
- Ffeil
Papurau ychwanegol John Sam Efans yn cynnwys atgofion am ei brofiadau yn ystod yr Ail Ryfel Byd a'i gysylltiad â D. M. Motors, Llanrug, sir Gaernarfon / Additional papers of John Sam Efans including recollections of his experiences during the Second World War and his connection with D. M. Motors, Llanrug, co Caernarfon.
Efans, John Sam Caernarfon