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The School Edition. Euclid's Elements. [Book 1-6, 11, 12] ... By R. Potts. Fifth Edition. Corrected and Improved

出版	Longman & Company, 1864
URL	http://books.google.com.hk/books?id=64BaAAAAcAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN