Williams-Ellis (1935). The White Sea canal: being an account of the construction of the new canal between the White Sea and the BalticSea. London: John Lane. Ruder
memiliki media mengenai Baltic region. The BalticSea Information Centre Diarsipkan 2008-02-08 di Wayback Machine. EU BalticSea Region Strategy (EUSBSR)
the sea, see 38'43 - 38'48. For the sandbanks, see 38'48 - 39'06. For brown trouts reproducing up river, see 39'06 - 39'33. "Gulf of Riga | BalticSea".