00743cam a22002053a 450000100060000000300060000600500170001200800410002904000150007004200070008505000060009210000240009824502500012226000290037250600300040151600200043165300150045183000290046685600420049530112PGUSA20140828083642.0090927s2009||||xxu|||||s|||||000 | eng d  aPGUSAbeng  adc 4aQ1 aNewville, Leslie J.10aDevelopment of the Phonograph at Alexander Graham Bell's Volta Laboratory :bContributions from the Museum of History and Technology, United States National Museum Bulletin 218, Paper 5, (pages 69-79)h[electronic resource] /cLeslie J. Newville  bProject Gutenberg,c2009  aPublic domain in the USA.  aElectronic text  aPhonograph 0aProject Gutenbergv3011240uhttp://www.gutenberg.org/ebooks/30112