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Discoveries: Workbook : teacher's annotated edition
William Kirtley Durr
出版Houghton Mifflin Company, 1987
ISBN03954306909780395430699
URLhttp://books.google.com.hk/books?id=RCpeh0PkLm0C&hl=&source=gbs_api
註釋Resource book, answer book, challenge projects, handbook, scope and sequence, placement, biographies and bibliography, index, folders.