Não informado. (1856). Abstracts of the Proceedings of the Geological Society of London. Geological Society of London.
Chicago-referens (17:e uppl.)Não informado. Abstracts of the Proceedings of the Geological Society of London. London: Geological Society of London, 1856.
MLA-referens (8:e uppl.)Não informado. Abstracts of the Proceedings of the Geological Society of London. Geological Society of London, 1856.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.