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- Louisiana. Dept. of Education24
- Alabama. Dept. of Education20
- National Center for Education Statistics14
- United States14
- Alabama. State Board of Education11
- United States. Office of Educational Research and Improvement11
- National Education Association of the United States10
- Whipple, Guy Montrose, 1876-194110
- Connecticut. State Dept. of Education9
- Harris, William Torrey, 1835-19099
- National Institute of Education (U.S.)9
- Henry, Nelson B. (Nelson Bollinger), Jr., 1883-19698
- American Council on Education7
- Ebaugh, Cameron Duncan, 1893-7
- United States. Bureau of the Census7
- United States. Department of Education7
- United States. Department of the Army7
- United States. Office of Education7
- University of Iowa7
- Choudhury, Jayanta, 1972-6