Multiple Urls for Same Article

I am getting duplicate meta description alerts in Webmaster tools in hundreds of urls. I checked and here is an example.

http://www.quickonlinetips.com/archives/2011/12/bing-magical-holiday-calendar/1345405579000
http://www.quickonlinetips.com/archives/2011/12/bing-magical-holiday-calendar/1346197967000
http://www.quickonlinetips.com/archives/2011/12/bing-magical-holiday-calendar/

All these urls are working on their own urls. Even the canonical urls in each of them point to different urls, Google cannot consider them as one url. I am not sure where these numbers are coming from, but they are appearing on many urls.

Please advise how to fix these duplicate urls.