Bibliography

• U.S. Army, "Hello Girls of World War I", available at Army.mil.
• National Archives Catalog, "Signal Corps - Apparatus - Telephone Operators - Women [165-WW-511C-3]", NAID: 45549880, Local ID: 165-WW-511C-3, accessible at National Archives.
• Smithsonian National Museum of American History, "Collection NMah_335411", available at Smithsonian Institution.
• Springfield College Archives, "Collection p15370coll2/id/2282", accessible at Springfield College.