Snowdonia National Park Study Centre

year of pub­li­ca­ti­onISBNauthor(s)title
1987978-0-9512373-0-4M. C WilliamsChwarelwyr cyntaf Ffestiniog
  ''978-0-9512373-1-1M. J. T LewisPioneers of Ffestiniog slate
  ''978-0-9512373-2-8Lewis. M.J.T.The Slate quarries of North Wales in 1873: A series of letters by a special correspondent of The Carnarvon and Denbigh herald
1989978-0-9512373-3-5M. J. T LewisSails on the Dwyryd: The river transport of Ffestiniog slate
  ''978-0-9512373-6-6Gwyndaf HughesHouse on a hill: A history of Plas Tan y Bwlch and the Maentwrog Valley