Sometimes scientific research isn't published in books or scholarly journals--it can also be published on government or NGO websites. Research published on these sites is called gray literature, and it can be an important supplement to the information you get from books and electronic texts.
But not all information you find on the web is either reliable or at the level of scholarly research. Ask these questions to help you determine whether a web site is worth using for your paper:
You can find some examples of websites that are reliable sources of research on the Information on Specific Substances/Toxins page of this guide.
Finally, if you have any doubts about the credibility of a source and the accuracy of the contents, check other reliable sources to confirm the claims.
Note: If you do a Google search about your topic and some results come back from Google Books, you'll find that you aren't able to read all of the pages of the book online. Check the title of the book and look it up in our Library Catalog to see if we own it.