AGE GRADES (PERSONS)
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BTPERSONS AND PERSONAL CHARACTERISTICS
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UDC-053
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Descriptor GERALTERSGRUPPEN (PERSONEN)
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Descriptor ENGAGE GRADES (PERSONS)
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Descriptor FREGROUPES D'ÂGE (PERSONNES)
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NTOLD PEOPLE (PERSONS)
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NTADULTS AND GROWN-UPS (PERSONS)
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NTADOLESCENTS (PERSONS)
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NTYOUTHS AND MINORS (PERSONS)
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NTCHILDREN (PERSONS)
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NTCHILDREN OF SCHOOL AGE (PERSONS)
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NTTODDLERS AND PRESCHOOL CHILDREN (PERSONS)
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NTINFANTS AND BABIES (PERSONS)