What are the sectores of the economy?
Since this is not my area of expertise, I searched Google under the key words "economy sectors" to get these possible sources:
http://www.tutor2u.net/economics/content/topics/development/development_economy_sectors.htm
http://geography.about.com/od/urbaneconomicgeography/a/sectorseconomy.htm
http://en.wikipedia.org/wiki/Social_economy
http://en.wikipedia.org/wiki/Economy#Sectorial_evolution
I hope this helps. Thanks for asking.