Nationaal Scholierenonderzoek 1990 - NSO'90
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Survey among pupils of secondary schools with a great number of detailed questions about their living conditions, opinions, and attitudes. Living conditions at school and at...
针对中学学生开展的调查，该调查包含大量关于其生活状况、观点与态度的细致问题，内容涵盖在校及……的生活状况
