[CJ603AAA], Letter from Thomas Alva Edison to Herman Ernest Dick, May 11th, 1900
Delaware Lackawanna and Western Railroad
[CJ603-F] Company Records Series -- Edison Portland Cement Company -- Corporate Files
https://edisondigital.rutgers.edu/document/CJ603AAA
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Archive.org Viewer, Microfilm Series Reel 202