I want to know the revision of a HTML of an article. 

I noticed that every page (no matter which namespace an article is in), the HTML contains a section "printfooter", and there will be a url after that looks like:

The "oldid=659536" is just the revision id of the HTML of an article.

My question is, if this is a reliable way to find out the revision? Or is there other recommended way?

Thanks
--
Jiang BIAN

This email may be confidential or privileged.  If you received this communication by mistake, please don't forward it to anyone else, please erase all copies and attachments, and please let me know that it went to the wrong person.  Thanks.