One of the most important changes brought by the Internet is in photo research. Authors can now include print-outs of or pointers to images on the web in their book and article proposals. Lindstrom appreciates pointers to good images as much as the text sources that authors list in their bibliography. Many authors list web sites and what they've seen on them. Sometimes they print what's there and send it along with their article.
Any editor is happy to see images with text.
You have to evaluate them together. Library Research Culleton, Lindstrom, and Hogan stress that the Internet should not be an author's only source of information. However, knowing how to restrict your search on the Internet is essential. Historical information is still better researched at libraries. Lindstrom echoes those comments on the importance of library research.