American Society of Civil Engineers (1916). Proceedings of the American Society of Civil Engineers. The Society. p. 598. 'On some rivers, particularly where melting first takes place on the upper river, as on the Oder and Weichsel in Germany, the formation of ice jams is a frequent cause of floods.'. Gearchiveerd op 6 augustus 2023.
American Society of Civil Engineers (1916). Proceedings of the American Society of Civil Engineers. The Society. p. 598. 'On some rivers, particularly where melting first takes place on the upper river, as on the Oder and Weichsel in Germany, the formation of ice jams is a frequent cause of floods.'. Gearchiveerd op 6 augustus 2023.
