What evidence have archaeologists found of a highly developed civilization in the Indus River Valley?

Question

http://www.harappa.com/har/har0.html

http://en.wikipedia.org/wiki/Indus_Valley_Civilization

http://www.sscnet.ucla.edu/southasia/History/Ancient/Indus2.html

http://members.aol.com/Donnclass/Indialife.html

http://www.answers.com/topic/indus-valley-civilization

http://www.ancientindia.co.uk/indus/home_set.html

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Answer 1

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