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
Oppenheimer Hat Guide | Hat Growth
J. Robert Oppenheimer Fedora | Page 5 | The Fedora Lounge
Play The Man in the Fedora Hat by Oppenheimer Backroom on Amazon Music