Url https://edisondigital.rutgers.edu/document/NA239031 Resource class dctype:Text Title [NA239031] Technical Note, 1913-1914 Creator Christensen, Peter Christian Edison, Thomas Alva Subject Disc record and duplicating technology Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1913-1914 Type Technical Note Identifier NA239031 Source 228:727 Rights Thomas Edison National Historical Park Has Version https://archive.org/details/edisonmicrofilm228/page/n736/mode/1up Archive.org Viewer, Microfilm Series Reel 228 Is Part Of NA239-F Uri https://edisondigital.rutgers.edu/document/NA239031 https://edisondigital.rutgers.edu/document/NA239031 --