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1Argitaratua 1994GaiakLiburua
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10nork Ivanoff, André MarieGaiak “...Social service Research Methodology...”
Argitaratua 1994
Liburua -
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13nork Royse, David D. (David Daniel)Gaiak “...Social service Research Methodology...”
Argitaratua 2008
Liburua -
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17nork Berger, Raymond M. (Raymond Mark), 1950-Gaiak “...Social service Research Methodology...”
Argitaratua 1988
Liburua -
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