Inglis, R.H., Foulds, F.W.F., Shuttleworth, A., Alsharekh, A.M., Al Ghamdi, S., Sinclair, A.G., Bailey, G.N., "'The Palaeolithic Occupation of the Harrat Al Birk' : Preliminary report on 2015 fieldwork in Asir Province, southwest Saudi Arabia", , 2015