1. E.J. W. Barber, 1991 :Prehistoric Textiles. (Princeton UP).
2. N. Bogdan, 1980 : Personal communication.
3. L. Brown, and B. Cunliffe, 1984 : "Sling stones " pp.425 -426 in)Danebury: an Iron Age Hillfort in Hampshire. Vol 2 the excavations 1969-1978: the finds(London: CBA Res. Rep. 52).
4. L. Brown, B. Cunliffe, and C. Poole, 1991 : "Sling stones " p.404 in)Danebury: an Iron Age Hillfort in Hampshire. Vol 5 the excavations 1979-1988: the finds(London: CBA Res. Rep. 73).