Columbia subject headings:
Ionizing radiation--Safety measures.
Manhattan Project (U.S.)--History.
Nuclear weapons--Safety measures.
Harvard subject headings:
Ionizing radiation--Safety measures
Manhattan Project (U.S.)--History.
Nuclear weapons--Safety measures
United States. Army. Corps of Engineers. Manhattan District--History.
Princeton subject headings:
Ionizing radiation--Safety measures.
Nuclear weapons--Safety measures.
United States. Army. Corps of Engineers. Manhattan District--History.