Trudy Kaspijskoj Ekspedicij 1914-1915 gg : gidrologiceskija issledovanija v Kapsijskom More v 1914-1915 g : hydrological investigations in the Caspian Sea in the years 1914-1915 = Reports of the Caspian Expedition in the years 1914-1915
N.M. Knipovic
Bok Russisk 1921