Internet, http://www.worldcat.org/title/wrack-fauna-of-sweden-and-finland-ecology-and-chorology,
2017-03-13
Information trouvée : Prénoms
Internet, https://www.myheritage.fr/research/collection-10182/biographical-summaries-of-notable-people?itemId=1426670&action=showRecord&recordTitle=Helge+Alfred+Oskar+Backlund,
2017-03-13
Information trouvée : année de naissance
Wrack fauna of Sweden and Finland, ecology and chorology / H. O. Backlund, 1945