One-parameter family of closed, radiation-filled Friedmann-Robertson-Walker ``quantum'' universes

Using as an illustrative example the p=1 operator-ordered Wheeler-DeWitt equation for a closed, radiation-filled Friedmann-Robertson-Walker universe, we introduce and discuss the supersymmetric double Darboux method in quantum cosmology. A one-parameter family of quantum'' universes and the corresponding wavefunctions of the universe" for this case are presented