Related Clues:

• Primitive
• Historical period
• Rocky period?
• It began around 1100 B.C. in Europe
• It started a little before 1000 B.C.
• Early period in human history
• Barney and Fred's day
• Historic period
• Early time
• Prehistoric period
• Retooling time?
• When coins came into common use
• Period of metalwork advances
• Period in human development
• Rocky period of history?