- FondsPP - Koop Family fonds
- Series8 - Photo Col. 500 - Koop family photograph collection
- 512 more...
- Item510.0 - Postcard: Type of train(?) in Nizhni-Novgorod
- Item511.0 - Postcard: A street in Nizhni-Novgorod
- Item512.0 - Postcard: A garden in Nizhni-Novgorod
- Item513.0 - Postcard: A church(?) in Nizhni-Novgorod
- Item514.0 - Postcard: Kaperatin street in Nizhi-Novgorod
- Item515.0 - Postcard: Haus der "Auflagewirtschaft" in Nizhi- Novgorod
- Item516.0 - Red Gate at Sebesch on the Russian border, 1929
- Item517.0 - Transfer from the Russian to Lithuanian train, 1929
- Item518.0 - Peter Koop was sent to the forests of northern Russia
- 237 more...