During World War II, "Preparation 38" was the codename for uranium oxide used by German scientists.123
Per F. Dahl, Heavy water and the wartime race for nuclear energy (Institute of Physics Publishing, London 1999), p. 135 ↩
Uranium Oxide International Bio-Analytical Industries, Inc. Archived January 18, 2013, at the Wayback Machine http://www.ibilabs.com/U3O8-MSDS.htm ↩
Geoffrey Brooks (1992). Hitler's Nuclear Weapons. Pen and Sword. p. 40. ISBN 9780850523447. 9780850523447 ↩