Related Clues:

• Several periods
• Take all the marbles
• Period piece?
• Practice frugality
• Important historic period
• Sports column
• Geological time period
• Important time span
• Gets going
• Other than
• Archeozoic, e.g.
• Depression, for one
• 1970's-80's cause, for short
• Gay 90's, e.g.
• History text topic