Employment (1) Composition (1) Assaying (1) Terms and phrases (1) Terms and phrases (1) Primary commodities (1) Tools (1) Time (1) Stone implements (1) Skin (1) Igneous rocks (1) Rocks (1) Raw materials (1) Padlocks (1) Obsidian (1) Necessity (Philosophy) (1) Nails and spikes (1) Licenses (1) Investment analysis (1) Hunting and gathering societies (1) Hunters (Horses) (1) Hunters (1) Functional analysis (1) Discussion (1) Culture (1) Back (1) Average (1) Weapons (1) Use studies (1) Use studies (1)