Alien invaders - putting a stop to the ballast water hitch-hikers Corporate author International Maritime Organization (IMO) Date 1998 Source IUCN (ID: MON-065790) Publisher | Place of publication International Maritime Organization (IMO) | London, UK Pages 17 p. Document type Article in periodical Language English Field of application International Subject Sea, Wild species & ecosystems Keyword Navigation Alien species Wild fauna Wild flora Management/conservation