How long is a piece of elastic?  The measurement of female activity rates in British censuses, 1951-1981.
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D019352:Censuses; D003625:Data Collection; D019049:Developed Countries; D004467:Economics; D004651:Employment; D005060:Europe; D006280:Health Workforce; D009790:Occupations; D011154:Population Characteristics; D015203:Reproducibility of Results; D012106:Research; D012107:Research Design; D012922:Social Change; D012923:Social Class; D012959:Socioeconomic Factors; D006113:United Kingdom; D014933:Women's Rights
Census; Data Adjustment; Data Collection; Data Sources; Developed Countries; Economic Factors; Employment Status--women; Europe; Human Resources; Labor Force--women; Measurement; Northern Europe; Occupations--women; Population Statistics; Reliability; Research Methodology; Social Change; Socioeconomic Factors; Socioeconomic Status; United Kingdom; Women's Status