database allows you to:
Read the full text of dissertations published since 1997
Get citations to dissertations going back to 1861
Preview the first 24 pages of U.S. disserations
Set up Alerts to let you know when new dissertations on a topic are available
Browsing through other dissertations is helpful for their examples of outlines, introductions and literature reviews
If you want to read a dissertation that is not availble in full text, you can order it via Interlibrary Loan.