Report of the Zemsky Chief of the Pechora Edge L.V.Corvin Piotrovsky about the Great Water Siberian Route, read in Moscow on Apr...

Corvin-Piotrovsky, Ludwig Vladislavovich (1866-).Report of the Zemsky Chief of the Pechora Edge L.V.Corvin-Piotrovsky about the Great Water Siberian Route, read in Moscow on April 29, 1910 in the premises of the Moscow merchant council.- Moscow: Type.A.N.Ivanova, 1910. -21 p.;23. -.I. Piotrovsky, Ludwig Vladislavovich (1866-).Electronic Source: PB