Nezhihovsky, R.A. (1988). "Voprosy gidrologii reki Nevy i Nevskoy guby" [Questions of hydrology of the Neva river and the Neva Bay]. Gidrometeoizdat. Leningrad: 213–215. LCCN87116913. OL2428838M.
openlibrary.org
Nezhihovsky, R.A. (1988). "Voprosy gidrologii reki Nevy i Nevskoy guby" [Questions of hydrology of the Neva river and the Neva Bay]. Gidrometeoizdat. Leningrad: 213–215. LCCN87116913. OL2428838M.