What is the holy source silent about. Based on the materials of the expedition “Plash of Eternity” Yakovleva G.V., Kopnov Yu.V., Stekhin A.A.
WATER AND THE WORLD – Essays on the history of water use. Part 2 – Water and Russia Krasnov I.A., Starostin D.N., Sukhorukova A.S., Yukhneva E.D.