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9Argitaratua 2005GaiakLiburua
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10nork Saxe, LeonardGaiak “...Evaluation research (Social action programs) United States....”
Argitaratua 1981
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11nork Levine, Donald Nathan, 1931-Gaiak “...Parsons, Talcott, 1902- Structure of social action....”
Argitaratua 1980
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