Keywords: Signature de André-Michel Guerry.png Signature of Andre-Michel Guerry from a letter to Charles Babbage dated 7 August 1860 fr Photo de la signature d'André-Michel Guerry 1860-08-07 Original publication The History of Science and Technology Series three Papers of Charles Babbage 1791-1871 Part 1 Correspondence and Scientific Papers from the British Library London <br/> Immediate source Microfilm copy Andre-Michel Guerry other versions pd-old-100/1923 Original upload log page en wikipedia Signature_of_Andre-Michel_Guerry png 2012-12-18 14 25 MichaelFriendly 194×166× 10603 bytes Uploading an old public-domain work using File Upload Wizard Uncategorized 2016 May 14 |