1. The Technology of Slate;Bowles,1922
2. Blue slate quarriying in South Devon: an ancient industry;Born;Ind. Archeology Rev.,1988
3. Roman rural settlements in Flanders. Perspectives on a ‘non-villa’ landscape in extrema Galliarum;De Clercq,2011
4. The Roman Swithland slate industry;McWhirr;Trans. Leicester Archaeol. Historical Soc.,1988
5. Slate roofing and gradind in the new millenium;Stearns;Interface,2000