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• Laleydigital
  

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• Laminación
  

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• Latindex
  

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• Layar
  

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• LIBER : Ligue des Bibliothèques Européennes de Recherche – Association of European Research Libraries
  

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• LibQUAL+
  

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• Library Hub Discover
  

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• LibraryH3lp
  

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• LibraryThing
  

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• LILACS
  

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• LION : Literature Online
  

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• LISA : Library and Information Science Abstracts
  

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• Literatura gris
  

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• LLBA : Linguistics and Language Behavior Abstracts
  

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• LOCKSS : Lots Of Copies Keep Stuff Safe