Author
Childs, George William, 1829-1894
1
En Foco, Inc
1
Harvey, David Alan
1
Leland, Charles Godfrey, 1824-1903
1
National Education Association of the United States. Department of Supervision and Curriculum Development
1
National Geographic Society (U.S.)
1
Polish YMCA
1
Society for Curriculum Study
1
United States Sanitary Commission
1