Where can I find an authoratative history of the NASDAQ composite index back to 1999?

chrisb: Where can I find an authoratative history of the NASDAQ composite index back to 1999?
Ideally I’d like data and a visually informative chart.

Answers and Views:

Answer by Dr.Know
Chart:

https://finance.yahoo.com/q/bc?s=%5EIXIC&t=my

Data:
https://finance.yahoo.com/q/hp?s=%5EIXIC&a=00&b=1&c=1999&d=02&e=9&f=2006&g=d