...the physicists have known sin; and this is a knowledge which they cannot lose

- http://nuclear-history.org/
- http://www.bankreferatov.ru/db/M/431CF4BCA6CE7705C325696E004D7E10
- http://military.claw.ru/
- http://www.5ballov.ru/referats/preview/19785
- http://en.wikipedia.org/wiki/Nuclear_weapon
- http://www.awe.co.uk/main_site/about_awe/history/index.html
- http://www.nv.doe.gov/library/films/film.aspx?ID=63
***http://nuclearweaponarchive.org/Usa/Med/Lbfm.html