New Orleans Public Schools. Division of Educational Research & Hill, D. S. (1916). Industry and education: A preliminary study of manufacturing establishments of New Orleans and mechanical occupations of boys and men with reference to education and a plan for the Delgado school. Commission Council.

New Orleans Public Schools. Division of Educational Research and David Spence Hill. Industry and Education: A Preliminary Study of Manufacturing Establishments of New Orleans and Mechanical Occupations of Boys and Men with Reference to Education and a Plan for the Delgado School. New Orleans: Commission Council, 1916.

New Orleans Public Schools. Division of Educational Research and David Spence Hill. Industry and Education: A Preliminary Study of Manufacturing Establishments of New Orleans and Mechanical Occupations of Boys and Men with Reference to Education and a Plan for the Delgado School. Commission Council, 1916.