Triangle Research Libraries Network (TRLN) is a collaborative organization of Duke University, North Carolina Central University, North Carolina State University, and The University of North Carolina at Chapel Hill, the purpose of which is to marshal the financial, human, and information resources of their research libraries through cooperative efforts in order to create a rich and unparalleled knowledge environment that furthers the universities' teaching, research, and service missions.
The Center for Research Libraries (CRL) is a consortium of North American universities, colleges, and independent research libraries. The consortium acquires and preserves newspapers, journals, documents, archives, and other traditional and digital resources for research and teaching and makes them available to member institutions through interlibrary loan and electronic delivery.
Check out this list of text corpora: Korpora und Textdatenbanken (Berlin)
Check out Internetquellen at Uni Bonn
Microfilm sets are often expensive and held at CRL or one local library only; search the TRLN Catalog for more local, triangle area resources