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Trends in academic progress : achievement of U.S. students in science, 1969-70 to 1990, mathematics, 1973 to 1990, reading, 1971 to 1990, writing, 1984 to 1990 / by Ina V.S. Mullis ... [et. al.] ; prepared by Educational Testing Service under contract with the National Center for Education Statistics, Office of Educational Research and Improvement, U.S. Department of Education. |
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