The comparative DRRs for exposure of canines to bilateral, uniform versus unilateral, non-uniform mixed neutron:gamma radiation relative to unilateral, non-uniform, 1 Mev x-radiation. Canines, beagles or mongrels, were exposed to bilateral steady state uniform or unilateral, non-uniform mixed neutron:gamma radiation at steady state or pulse rate exposure relative to unilateral, non-uniform 1 Mev x-radiation (Ainsworth et al. 1965; George et al. 1968; MacVittie and Jackson III 2020).