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A Guide Illustrating Contributions of Sixth, Seventh, and Eighth Grade Camping Programs to Science, Social Studies, Mathematics, and Language Arts Instruction in the Cortland College Campus School

George Clarence Kelley

出版	Cornell Univ., 1965
URL	http://books.google.com.hk/books?id=tZVOAAAAYAAJ&hl=&source=gbs_api