1941 Keep ‘Em Rolling! [PT boats]
![1941 Keep 'Em Rolling! [PT boats]](https://digitalposterarchive.com/wp-content/uploads/2024/11/1941-Keep-Em-Rolling-PT-boats.jpg)
Lionni, Leo, 1910-1999. Keep ’em rolling! [PT boats], poster, 1941; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc281/m1/1/: accessed November 27, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.