00342nam a2200133Ia 4500008004100000041000800041084001200049100001700061245006100078260003300139653001000172653001200182653001400194160808s1963    xx            000 0 eng d  aeng  aC5K2CC  aClark, G. L.  aEncyclopedia of X - rays and Gammarays /cby G. L. Clark  aNew York :bReinhold,c1963.  aLight  aPhysics  aRadiation