School of Boatswains of the Navy and Roth Jung on the island of Valaam: [booklet] / Valaam State History-Architectural and Natur...

The School of Boatswains of the Navy and Roth Jung on the island of Valaam: [Building] / Valaam State Historical and Architectural and Natural Museum-Reserve.- Petrozavodsk, 1986. -A letter from the regional museum of the Northern Ladoga No. 31 of March 31, 2022..Electronic copy source: PB