Não informado. (1961). Netherlands Journal of Sea Research. Netherlands Institute for Sea Research.
Chicago-viite (17. p.)Não informado. Netherlands Journal of Sea Research. Texel, Holanda: Netherlands Institute for Sea Research, 1961.
MLA-viite (8. p.)Não informado. Netherlands Journal of Sea Research. Netherlands Institute for Sea Research, 1961.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.