Geographical reference data Amsterdam - AdamNet/AdamLinkHeritage data Amsterdam - AdamNet/AdamLinkCollection - Amsterdam MuseumImage Database - IISHImage Database - Noord-Hollands ArchiefPublications - Amsterdam Public LibraryCollection - Rijksmuseum AmsterdamImage Database - Amsterdam City ArchiveImage database - Library of the University of AmsterdamMaps - Library of the University of AmsterdamPortraits - Library of the University of Amsterdam