1 نتائج 'surveys'
Surveys
Encuesta (es), Обзоры (ru), استقصاءات (ar), مُسوح (ar), Enquête (fr)
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Field work
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Sample surveys, Survey analysis
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Data collection, Population censuses, Questionnaires, Social surveys, Soil surveys, Surveying, Target groups
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Science
> Scientific approach
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http://vocabularies.unesco.org/thesaurus/concept7393