00357nam a2200109Ia 450000500170000000800410001705000190005810000130007724500830009026000290017365000450020220251229124839.0251229s9999    xx            000 0 und d  aSPEC H 62 .S59  aPerri 6. 0aPrinciples of  methodologyb research design in social science.cPerri 6 Perri  aLos Angelesb Sagec2012  aSocial Sciences-- Research-- Methodology