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English Patents; Being a Register of All Those Granted for Inventions in the Arts, Manufactures, Chemistry, Agriculture, ... During the First Forty-five Years of the Present Century

Andrew Pritchard

出版	Whittaker and Company, 1847
URL	http://books.google.com.hk/books?id=uF-YwrfcMYUC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN