The Oppenheimer Fedora Hat, Camel Wool Felt Hat, Men's Hat, Fall Fashion, Women's Fedora, Handmade Hat - Etsy
Oppenheimer': Great Entertainment, Disfigured History | National Review
Manhattan Project National Historical Park - It's Felt Hat Day! What WAS Oppenheimer Wearing? In almost any book or article about Dr. J. Robert Oppenheimer, Scientific Director of the Los Alamos Laboratory