Onderzoek studieduur 1963
收藏B2FIND2026-03-19 收录
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https://b2find.eudat.eu/dataset/9fa42efa-ec74-557b-909f-6791677f3117
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资源简介：
Study efficiency / study habits / evaluation of study / relation to staff / membership of organizations / social participation / data on work and on family background....
