The informal report drafted by a University of Chicago team, regarding contract OEMsr-79, documented efforts to record chemical warfare agents using sensitized paper tape. The report includes one such strip (2012-002_4980). In a letter to Arnold Beckman, evidently sent separately but filed with the report, Weldon Brown requested the report's classification be changed from "Confidential" to "Secret."
Ballweber, Edward G., Donald E. Pearson, Weldon G. Brown, Kenneth E. Wilzbach, Nicholas Nicolaides, William R. Remington, and Robert J. Stell. “Report: Paper Tape Recording of CW Agents,” March 30, 1944. Beckman Historical Collection, Box 18, Folder 32. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/gt54kn42k.