British and Irish Studies 

Worldcat
Catalog of libraries in US, Canada and beyond.

Center for Research Libraries (CRL)
A consortium of North American universities, colleges, and independent research libraries that acquires and preserves newspapers, journals, documents, archives, etc.   They can be borrowed on extended loan via Interlibrary Loan.

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Global Books in Print  
Find books published in the UK, Ireland, Australia, Canada and New Zealand.

• Index to Theses (British and Irish)
  An index to theses accepted for higher degrees by the Universities of Great Britain and Ireland from 1970. Abstracts are included for all records.
  
• Dissertations and Theses: Full Text
  Dissertations accepted at accredited institutions since 1861. Covers most U.S. institutions, and some from Canada and other countries.