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The Schoolmasters Assistant. Being a Compendium of Arithmetic, Both Practical and Theoretical. In Five Parts ... The Twenty-first Edition. By Thomas Dilworth ..
Thomas Dilworth
出版Richard and Henry Causton (successors to the late Mr Henry Kent), 1781
URLhttp://books.google.com.hk/books?id=YhXDMuKwgXgC&hl=&source=gbs_api
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