Url https://edisondigital.rutgers.edu/document/CK620ABC Resource class dctype:Text Title [CK620ABC], Letter from W M Sheldon to Frederick W Cunningham, June 14th, 1920 Creator Sheldon, W M Subject Metals and minerals Electric battery Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1920-06-14 Type Letter Identifier CK620ABC Source 213:129 Rights Thomas Edison National Historical Park Date Created 1920-06-14 Has Version https://archive.org/details/edisonmicrofilm213/page/n138/mode/1up Archive.org Viewer, Microfilm Series Reel 213 Is Part Of CK620-F Recipient Cunningham, Frederick W Uri https://edisondigital.rutgers.edu/document/CK620ABC https://edisondigital.rutgers.edu/document/CK620ABC --