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... Descriptive Index of Patents Applied for and Patents Granted
Great Britain. Patent Office
其他書名
Being the Abridgements of Provisional and Complete Specifications for the Year[s] 1867-1868
出版G. E. Eyre and W. Spottiswoode, 1868
URLhttp://books.google.com.hk/books?id=zWsyAQAAIAAJ&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN