Zambia, previously called Northern Rhodesia, was a colony of Great Britain until 1964, when it gained independence and changed its name. It is a landlocked country located in southern Africa and shares its borders with Zimbabwe, Namibia, Botswana, Mozambique, Malawi, Tanzania, Congo and Angola. It has an area of 752 612 km 2 , about three times the size of Britain, but a population of only 12 million.
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Ngungu et al. (2009) studied this question.
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