Media type: E-Article Title: Blue Contributor: Dunbar, Paul Laurence Published: SAGE Publications, 1903 Published in: Journal of Education, 58 (1903) 19, Seite 321-321 Language: English DOI: 10.1177/002205740305801909 ISSN: 2515-5741; 0022-0574 Origination: Footnote: Access State: Open Access