An incredible amount of scholarly, easily-accessed information can be found in dissertations. Use them to find:
1. Dissertations full text (PQDT) - ProQuest Dissertations and Theses Global - except for a handful of schools and old thesis, essentially all full-text dissertations from North American universities. British disseratons are now also represented.
2. British dissertations (EThOS) - British Library's service of UK dissertations. Not as comprehensive as PQDT, but worth searching.