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Elementary and Secondary Education

National Center for Education StatisticsLaurence T. Ogle

出版	U.S. Department of Education, Office of Educational Research and Improvement, National Center for Education Statistics, Information Services, 1991
ISBN	01603585669780160358562
URL	http://books.google.com.hk/books?id=oi5iPQAACAAJ&hl=&source=gbs_api