Watson, R., & Tippet, C. (1981). Examples of low-level aerial surveys conducted in Africa from 1968 to 1979: One firm's experience. International Livestock Centre for Africa.
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Cita Chicago Style (17a ed.)
Watson, R.M, y C.I Tippet. Examples of Low-level Aerial Surveys Conducted in Africa from 1968 to 1979: One Firm's Experience. International Livestock Centre for Africa, 1981.
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Cita MLA (9a ed.)
Watson, R.M, y C.I Tippet. Examples of Low-level Aerial Surveys Conducted in Africa from 1968 to 1979: One Firm's Experience. International Livestock Centre for Africa, 1981.
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