Web research can be very useful and lead to much useful and important information. While every effort has been made to list only "reliable" sites, researchers should be aware that control of sites change (often without notice) from time to time and, thus, the reliability and point of view of the website may change (for better or worse). One of the best uses of web information is to locate good primary and secondary sources that should be directly examined. Websites also go out of existence, so, for scholarly work, they are not reliable sources, like a published work which, presumably, will always be available in some library (Library of Congress) for examination. Beware especially of quoting or otherwise relying upon unidentified opinions found on websites.