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Gray, David (2002) Bows of the World. The Lyons Press.

(1992) The Traditional Bowyers Bible Volume 1. The Lyons Press. .

(1992) The Traditional Bowyers Bible Volume 2. The Lyons Press. .

(1994) The Traditional Bowyers Bible Volume 3. The Lyons Press. .

The ballistics of the sling, Thom Richardson, Royal Armouries Yearbook, Volume 3 1998.