Reports : Thousands works of art found in raid by Nazis tax authorities . Paintings by Klee , Augsburg , Chagall , Klee believed to have been looted by German . `` The risk/reward is going against them . Experts call for works to be returned to the families of those they were stolen from .
Reports : Thousands works of art found in raid by Nazis tax authorities . Paintings by Klee , Augsburg , Chagall , Klee believed to have been looted by German . Experts call for works to be returned to the families of those they were stolen from .