Arquivo.pt - The Portuguese web-archive (PWA) is the national Web archive of Portugal. Its mission is to periodically archive contents of national interest available on the Web, storing and preserving for future generations information of historical relevance. It is a service of the Foundation for Science and Technology (FCT).
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20091014222241/http://www.htmlhelp.com/reference/
The WDG Reference section
The WDG's reference section offers background information and technical specifications on HTML authoring. Its main purpose is not to provide browser-specific "hacks", or workarounds for browser bugs or limitations, but to give the correct way to do it. In cases where this may conflict with browsers, there will be a note explaining this.
The Wilbur section covers HTML 3.2. In this section you will find a list of all tags, including attributes, syntax, permitted contents and notes on usage. The HTML reference is also available in various help formats (Windows, Mac, OS/2) which can be used offline.
Style sheets can be used to suggest a layout for HTML documents. The Cascading Style Sheets section offers an introduction, a tutorial and a comprehensive reference for CSS1. Also available is the CSS Guide in Chinese, CSS Guide in Japanese, and CSS Guide in Spanish.
In the WDG's Links section, you will find pointers to HTML validators, which can help you catch syntax errors and ensure your documents conform to the standard.