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Google圖書搜尋
Discovering Meanings of Common Fractions, Decimal Fractions and Per Cent in Modern Mathematics
Willard Octive Stibal
其他書名
Programs for Children : the Wilhite Fractional Relation Board
出版
Shawnee Planing Mill
, 1965
URL
http://books.google.com.hk/books?id=c3NvHQAACAAJ&hl=&source=gbs_api
