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              Qvortrup, J. (1994). Childhood matters: Social theory, practice and politics. Ashgate Publishing. Sack, R. D. (1986). Human territoriality: Its theory and history. Cambridge University Press.
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              Qvortrup, J.F. et al. (Hrsg.) (1994). Childhood matters. Social theory, practice and politics. Aldershot.
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              Qvortrup, Jens/Bardy, Marjatta/Sgritta, Giovanni B./Wintersberger, Helmut (Hg.) (1994): Childhood Matters. Social theory, practice and politics, Alershot: Avebury.
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              Qvortrup, Jens/Bardy, Marjatta/Sgritta, Giovanni/Wintersberger, Helmut (Hg.) (1994), Childhood Matters. Social Theory, Practice and Politics. Aldershot u.a.
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              Qvortrup, Jens; Bardy, Marjatta; Sgritta, Giovanni & Wintersberger, Helmut (Hrsg.) (1994). Childhood matters. Social theory, practice and politics. Aldershot: Avebury Press.
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