title: Problems of identification and measurement of special categories of persons that cross international boundaries in Africa.
mesh_terms: D000349:Africa; D003710:Demography; D003906:Developing Countries; D004641:Emigration and Immigration; D005069:Evaluation Studies as Topic; D006285:Health Planning; D009934:Organization and Administration; D011153:Population; D011157:Population Dynamics; D012036:Refugees; D012106:Research; D012107:Research Design; D014171:Transients and Migrants
keywords: Africa; Demographic Factors; Developing Countries; Evaluation; Evaluation Methodology; International Migration; Measurement; Migrants; Migration; Obstacles; Organization And Administration; Planning; Population; Population Dynamics; Refugees; Research Methodology