Early Uranium ResearchThe Manhattan Project: An Interactive History. Office of History and Heritage Resources. Arkistoitu 22.11.2010. Viitattu 25.12.2010. (englanniksi)
The MAUD report, 1941The Manhattan Project: An Interactive History. Office of History and Heritage Resources. Arkistoitu 22.11.2010. Viitattu 25.12.2010. (englanniksi)
Early Uranium ResearchThe Manhattan Project: An Interactive History. Office of History and Heritage Resources. Arkistoitu 22.11.2010. Viitattu 25.12.2010. (englanniksi)
The MAUD report, 1941The Manhattan Project: An Interactive History. Office of History and Heritage Resources. Arkistoitu 22.11.2010. Viitattu 25.12.2010. (englanniksi)