Media type: E-Article Title: Factor Structure as Ecological Structure in Helsinki and Boston Contributor: Sweetser, Frank L. imprint: SAGE Publications, 1965 Published in: Acta Sociologica Language: English DOI: 10.1177/000169936500800302 ISSN: 0001-6993; 1502-3869 Keywords: Sociology and Political Science Origination: Footnote: