The Fifteenth International Congress on Hygiene and Demography Held by Washington, D.C., from September 16 to October 5, 1912

Auteur : Holmes Beckwith, National Education Association of the United States. National Council of Education. Committee on Standards and Tests for Measuring the Efficiency of Schools or Systems of Schools, United States. Bureau of Education, Women's Educational and Industrial Union (Boston, Mass.). Department of Research

Date de publication : 1913

Éditeur : U.S. Government Printing Office

Nombre de pages : 59