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E. O. OHUMA, E. A. OKIRO, A. BETT, J. ABWAO, S. WERE, D. SAMUEL, A. VYSE, N. GAY, D. W. G. BROWN and D. J. NOKES
doi:10.1017/S0950268808000848 (About DOI), Available on CJO 10 June 2008
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