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>> helsper, helga
>> klimkeit, hans-joachim
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helsper-christiansen, inge (1942)
helsper-christiansen, inge (1942)
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helsper, e. j.; kalmus, v.; hasebrink, u.; sagvari, b.; de haan, j. (2013): country classification: opportunities, risks, harm and parental mediation. london school of economics and political science: eu kids online.
oxford, pp. 81-83. helsper, e. j.; kalmus, v.; hasebrink, u.; sagvari, b.; de haan, j. (2013): country classification: opportunities, risks, harm and parental mediation. london school of economics and political science: eu kids online.
Last Update: 2018-02-13
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