00368 a2200145 4500020001500000082001700015100001900032245005700051250000800108260004300116300002500159650001100184650001100195650001600206 a0398069875 a537.535bSEL aSelman, Joseph aThe fundamentals of imaging physics and radiobiology a9th aIllinoisbCharles C Thomasc1954g2000 axxi,484p.billc26cm aRadium aX rays aRadiography