• Melvyl - Univeristy of California Library search
  in Public bookmarks with catalog library search by 3 users
• Questia - The Online Library of Books and Journals
  
  The Worlds Largest Online Library. Access the best in academic resources like Books, Journals, Articles, Encyclopedias and more. Faster, Easier Research online.
  articles book books digital e-library ebooks engine full-text journal library online research scholarly search tools
  in Public bookmarks with books ebooks library reference research search by 15 users
• SWAN Online Catalog
  in Public bookmarks with books library reference search swan

library+search from all users