Não informado. (1976). International dredging abstracts. British Hydromechanics Research Association.
Chicago-referens (17:e uppl.)Não informado. International Dredging Abstracts. Bedford, Inglaterra: British Hydromechanics Research Association, 1976.
MLA-referens (8:e uppl.)Não informado. International Dredging Abstracts. British Hydromechanics Research Association, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.