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The United New ... System of Arithmetic and Mental Calculations, of Doctor Willcolkes and Messrs. T. and T. W. Fryer ... Sixth Edition, Much Enlarged and Carefully Revised

出版	Henry Mozley&Sons, 1838
URL	http://books.google.com.hk/books?id=vQphAAAAcAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN