• LookSmart
  with engines looksmart search by 2 users
• Lycos
  with engines lycos search subject wpl-refdesk by 3 users
• Lycos
  with engines lycos search by 3 users
• Northern Light Search
  with engines light northern search subject wpl-refdesk by 35 users
• PhilanthropySearch
  The First Search Engine for the Non-Profit and Philanthropic Sector
  with engines non-profit philanthropic search subject wpl-refdesk
• Yahoo!
  with engines search subject wpl-refdesk yahoo by 432 users

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