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• Center for Jewish History Digital Collections (623)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (119)
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• Helda - Digital Repository of University of Helsinki (2)
• National Center for Biotechnology Information - NCBI (1)
• Publishing Network for Geoscientific & Environmental Data (59)
• QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (2)
• Queensland University of Technology - ePrints Archive (17)
• Universidad Autónoma de Nuevo León, Mexico (2)
• Universidad del Rosario, Colombia (1)
• Université de Montréal, Canada (1)
• University of Michigan (158)
• USA Library of Congress (1)