Url,"Resource class",Title,Creator,Subject,Description,Publisher,Date,Type,Format,Identifier,Source,Relation,Rights,"Alternative Title","Date Created","Date Issued","Has Version","Is Part Of","Has Format","Temporal Coverage","Date Accepted","Bibliographic Citation",Recipient,Uri https://edisondigital.rutgers.edu/document/D7903ZAT,dctype:Text,"[D7903ZAT], Letter from Karl Eduard Zetzsche to Telegraphic Journal, February 17th, 1879","Zetzsche, Karl Eduard","Telegraph | Microphone and other acoustic devices",,"Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University",1879-02-17,Letter,,D7903ZAT,49:106,"Hughes, David Edward | Barrett, William Fletcher","Thomas Edison National Historical Park",,1879-02-17,,"https://archive.org/details/edisonmicrofilm49/page/n114/mode/1up Archive.org Viewer, Microfilm Series Reel 49",D7903-F,,,,,"Telegraphic Journal","https://edisondigital.rutgers.edu/document/D7903ZAT https://edisondigital.rutgers.edu/document/D7903ZAT"