IV. Web Sources
Your next step may be to search the World Wide Web for additional materials on your topic. Since anyone can put anything on the web, the issue of quality is very important.
Check out the following links that can help you identify quality information from websites:
Techniques to Apply and Questions to Ask - A guide continaining questions to asked concerning website quality - by UC Berkeley
Web Page Evaluation Checklist - A guide listing criteria for web site quality - by UC Berkeley
The Good, the Bad, and the Ugly - A fun guide to web quality criteria - by Ithaca College
Using the right type of web search tool will save you time, and get you better results. Search engine results are often very different, so use more than one, or try a Meta Search Engine to search more than one engine at a time.
Search Engine Watch - A newsletter that highlights features and qualities of web search engines.
Also, Resnick Library has created some tables containing links to sites for all types of information. Most of these are reliable. Keep in mind that not all websites contain reliable information. See here.