00325nam a2200121Ia 4500008004100000082002000041100001500061245004500076260003200121300000900153630001800162650002300180211109s9999||||xx |||||||||||||| ||und||  a541.3884bCOM-R  aComar, C L 0aRadioisotopes In Biology And Agriculture  bMc Graw HillaNewyorkc1955  a481p  xGeneral Stack  aSciencexChemsitry