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Nuclear weapons:9 J& e* y# H' r+ i( q2 `6 U
http://nuclearweaponarchive.org/Nwfaq/Nfaq0.html
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1 K5 J4 |/ K$ k/ H; {Weapons of Mass Destruction. (2003). In Harvey Kushner (Ed.), Encyclopedia of Terrorism, Vol. 1. (404-406). Thousand Oaks: Sage Reference. Retrieved October 22, 2008, from Gale Virtual Reference Library via Gale:
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Nuclear Weapons. (2006). Encyclopedia of Modern Europe: Europe Since 1914: Encyclopedia of the Age of War and Reconstruction, Vol. 4. (1891-1898). Retrieved October 22, 2008, from Gale Virtual Reference Library via Gale:
! X. |+ L" m6 Q# }( u; R<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
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9 ^ K3 V0 I9 Z, Z( V0 ^, ~5 iClark, Roger. (2005). Nuclear Weapons. In Dinah Shelton (Ed.), Encyclopedia of Genocide and Crimes Against Humanity, Vol. 2. (754-761). Detroit: Macmillan Reference USA. Retrieved October 22, 2008, from Gale Virtual Reference Library via Gale:
8 }( }4 W: X4 V' c! X, W<http://find.galegroup.com/gvrl/i ... 925&version=1.0>3 F, d( R8 y6 b& q
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9 s+ ]" F2 ]" a& M5 m4 k% VLerner, K. Lee, Gilman, Larry, & Haycock, Dean Allen. (2004). Nuclear Weapons. In K. Lee Lerner & Brenda Lerner (Eds.), Gale Encyclopedia of Science, Vol. 4. (3rd ed., 2816-2821). Detroit: Gale. Retrieved October 22, 2008, from Gale Virtual Reference Library via Gale:
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; o7 O& A8 @$ z6 \critical mass5 i4 P# P" s! `- Q( l4 y) F8 b
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1. The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.& w7 I! [( T! ]' s' V4 a* P# V
2. The amount of matter needed to generate sufficient gravitational force to halt the current expansion of the universe
7 ?) _3 |- D. T# b( [( V' r4 y<http://www.thefreedictionary.com/critical+mass>3 v+ m9 N$ `7 g% j- \. ~- u0 r5 d
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