It is easy to create professional-looking web pages using easily obtained, even free, software. Some organizations provide free web publishing space. Others provide web space to their subscribers, so anyone with a few dollars can get their information published on the web. The information that is published does not necessarily have to meet any standards of accuracy or completeness. The web isn't always the best place to look for information.
Traditional sources are often more efficient, accurate, and complete.
Your local reference librarian can help you determine the best sources to use, which may save you a lot of research time. Web-based information is poorly organized. Even the best searches cannot be considered exhaustive or accurate. Because it is so easy and inexpensive to publish on the web, you should critically examine the information you find. Finding good material is possible, but it requires thought, practice, and patience.