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21Argitaratua 2001Gaiak “...Child welfare Government policy New Zealand Public opinion....”
Liburua -
22Argitaratua 2004GaiakLiburua
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23
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24nork Bartholet, ElizabethGaiak “...Child welfare Government policy United States....”
Argitaratua 1999
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25Argitaratua 2000GaiakLiburua