Berkelman, Karl, to Prof. James A. Earl, University of Maryland, re letter to R.R.W. requesting an electron beam calibration [cc], 3/23/1966

Berkelman, Karl, to Prof. James A. Earl, University of Maryland, re letter to R.R.W. requesting an electron beam calibration [cc], 3/23/1966, Box: 1, Folder: 39. Robert R. Wilson papers, 14-22-3093. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/222296 Accessed April 24, 2025.