Henri Poincaré Papers: Archives and Collections
Archival Sources for Volume 1
| Item | Collection/Institution | Address | Nation | From HP | To HP |
| 1 | Mittag-Leffler Institute | Auravägen 17, S-182 62 Djursholm | Sweden | 138 | 116 |
| 2 | Private collection 75017 | 75017 Paris | France | 1 | 4 |
| Total | 139 | 120 |
