- Martha Lillard, last US polio patient using iron lung, dies at 78 in Oklahoma AP News
- Last U.S. Polio Survivor in an Iron Lung Dies After the Machine Started to Break Down and They Couldn’t Find Anyone to Repair It People.com
- Oklahoma woman Martha Lillard, last US polio patient using iron lung, dead at 78 New York Post
- Oklahoma woman, the last American in an iron lung, dies at 78 KFOR
- The remarkable life story behind America’s last iron lung user Cleveland.com