Url https://edisondigital.rutgers.edu/document/E1770DO Resource class dctype:Text Title [E1770DO], Letter from Peter Christian Christensen to Thomas Alva Edison, May 11th, 1917 Creator Christensen, Peter Christian Subject Disc phonograph Disc record and duplicating technology Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1917-05-11 Type Letter Identifier E1770DO Source 269:317 Relation Meadowcroft, William Henry Rights Thomas Edison National Historical Park Date Created 1917-05-11 Has Version https://archive.org/details/edisonmicrofilm269/page/n327/mode/1up Archive.org Viewer, Microfilm Series Reel 269 Is Part Of E1770-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/E1770DO https://edisondigital.rutgers.edu/document/E1770DO --