This is probably the premier academic site in the United States. From here you can get to libraries, Middle East centers, and associations, such as the Middle East Studies Association.
Many sites have bibliographies.
There is also a list of countries. I suspect many of those llinks will lead to libraries and gopher sites. This is an enormous but well organized site. This is an Islamic site maintained by Muslims. It offers an introduction to Islam, with commentary on a number of fundamental concepts.