Holding Institutions
- Library of Congress - Motion Picture, Broadcasting and Recorded Sound Division (MBRS)96
- Lietuvos centrinis valstybės archyvas25
- Lisa von Haam Pumphrey1
- London Metropolitan Archives1
- Ludwig Boltzmann Institute for Digital History4
- Magnus-Hirschfeld-Gesellschaft e.V., Forschungsstelle zur Geschichte der Sexualwissenschaft1
- Magyar Országos Levéltár8
- Makhon le-ḥeḳer tenuʻat ha-ʻavodah ʻa. sh. Pinḥas Lavon1
- Maktabah al-Waṭanīyah lil-Mamlakah al-Maghribīyah1
- Margaret Weiss2
- Marie Brandes Hammerling4
- Mark Isenberg13
- Martin Elias5
- Massuah Institute for Holocaust Studies1
- Metro Theatre Center Foundation3
- Michael Brodnitz1
- Ministerstwo Spraw Zagranicznych. Archiwum1
- Ministério dos Negócios Estrangeiros, Serviço de Arquivo Histórico-Diplomático1
- Moravský zemský archiv v Brně1
- Moving Image Research Collections7