RResearch methods in social relationsResearch methods in social relationsde Claire Selltiz, Lawrence S. WrightsmanMateriasSocial sciencesResearchEdiciones (1)Research methods in social relations (1976)Holt, Rinehart and WinstonMás obras de Claire SelltizResearch methods in social relationsResearch methods in social relationsRResearch methods in social relationsResearch methods in social relations
