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- SpringerLink (Online service)352
- ebrary, Inc150
- ProQuest (Firm)67
- Project Muse23
- United States22
- American Association of School Administrators17
- United States. Office of Educational Research and Improvement17
- Cubberley, Ellwood Patterson, 1868-194114
- Fullan, Michael13
- Murphy, Joseph, 1949-13
- Reavis, William C. (William Claude), 1881-195513
- National Center for Education Statistics12
- Organisation for Economic Co-operation and Development12
- Samier, Eugénie Angèle, 1954-12
- Storey, Rose12
- United States. Congress. House. Committee on Education and Labor. Subcommittee on Elementary, Secondary, and Vocational Education12
- Library of Congress. Congressional Research Service11
- National Association of Secondary School Principals (U.S.)11
- Sergiovanni, Thomas J.11
- Strayer, George D. (George Drayton), 1876-196211