“Hybrid” databases (bibliographic information, plus full text):
ProQuest Digital Dissertations (access restricted to current Columbia affiliates)
Medline (access restricted to current Columbia affiliates)
Full text journal collections:
Interdisciplinary:JSTOR: the scholarly journal archive (access restricted to current Columbia affiliates)
Publisher-based:SAGE Full Text Collections (access restricted to current Columbia affiliates)
National libraries:
Wikipedia entry
US: Library of Congress, National Agricultural Library, National Library of Medicine
National Libraries of the world (via IFLA)