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od Eckland, Bruce K., 1932-1999
[Washington] : Dept. of Health, Education, and Welfare, Education Division, National Center for Education Statistics, 1979
[Washington] : Dept. of Health, Education, and Welfare, Education Division, National Center for Education Statistics, 1979
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od Kay, Evelyn Reis Ecker
[Washington] : Dept. of Health, Education, and Welfare, Education Division, National Center for Education Statistics : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977
[3d ed.]
[Washington] : Dept. of Health, Education, and Welfare, Education Division, National Center for Education Statistics : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977
[3d ed.]
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