Não informado. Progress Report of the Land Resources Division. Ministry of Overseas Development.
Chicago-referens (17:e uppl.)Não informado. Progress Report of the Land Resources Division. Surbiton, Inglaterra: Ministry of Overseas Development.
MLA-referens (8:e uppl.)Não informado. Progress Report of the Land Resources Division. Ministry of Overseas Development.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.