Discuss early trade among different groups of people

Answer 1

Where? When?

Answer 2

The first humans I suppose.... prehistory-3000 B.C.

Answer 3

http://en.wikipedia.org/wiki/Trade#History

http://www.historyworld.net/wrldhis/plaintexthistories.asp?historyid=ab72

http://www.livescience.com/4823-ancient-trade-changed-world.html

Answer 4

Thank you so much!

Answer 5

You're very welcome. :-)

Answer 6

como ago mi trabajo