found: Work cat.: Arbousse Bastide, T. Traditional weapons of Africa (billhooks, sickles and scythes), 2010:p. 2 (billhook shaped weapons seem to have as common ancestor a peculiar multipurpose knife with a a slightly curved blade and a main concave cutting edge)
found: Wikipedia, 25 Oct. 2010:under Billhook (The billhook (also bill hook although this more usually refers to a metal hook used to hold bills, common in the US) is a traditional cutting tool known and used throughout the world in agriculture and forestry for cutting smaller woody material such as shrubs and branches)
found: Timeless Tools website, 25 Oct. 2010(billhooks from catalogues)
