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المؤلفون: Bierschock, Kurt P., Dürnberger, Andrea, Rupp, Marina
المصدر: ifb-Materialien (3-2008)
الإتاحة: http://www.deutsche-digitale-bibliothek.de/item/HALRDWEAHV73X7GSHIYLDGL74CGQ6TWD
http://www.ssoar.info/ssoar/handle/document/12539
http://www.ssoar.info/ssoar/bitstream/handle/document/12539/ssoar-2008-bierschock_et_al-evaluation_des_hippy-programms_in_bayern.pdf?sequence=1