This primary source comes from the Records of the War Department General and Special Staffs.
Full Citation: Wounded soldiers receiving instructions on linotype machine at General Hospital Number 9, Lakewood, New Jersey; 10/21/1918; Medical Department - Restoration Work - Education and Rehab, 1917 - 1918; American Unofficial Collection of World War I Photographs, 1917 - 1918; Records of the War Department General and Special Staffs, Record Group 165; National Archives at College Park. College Park, MD. [Online Version, https://www.docsteach.org/documents/document/wounded-soldiers-receiving-instructions-linotype-machine-lakewood-nj, April 18, 2024]