[A new method of determining ages:  chronological classification].
Gubry
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D000349:Africa; D017954:Africa South of the Sahara; D000352:Africa, Northern; D017677:Age Distribution; D000367:Age Factors; D002596:Chad; D003625:Data Collection; D003710:Demography; D003906:Developing Countries; D005069:Evaluation Studies as Topic; D011153:Population; D011154:Population Characteristics; D015203:Reproducibility of Results; D012106:Research; D012107:Research Design; D013223:Statistics as Topic
Africa; Africa South Of The Sahara; Age Distribution; Age Factors; Chad; Comparative Studies; Data Analysis; Data Collection; Demographic Factors; Developing Countries; Estimation Technics; Evaluation; Evaluation Methodology; French Speaking Africa; Measurement; Middle Africa; Population; Population Characteristics; Reliability; Research Methodology; Studies