* {{cite book | last=Ross | first=Stewart Halsey | title=Strategic Bombing by the United States in World War II | publisher=McFarland | publication-place=Jefferson (N. C.) | date=2002-12-27 | isbn=0-7864-1412-X}}
<ref name="x073">{{cite book | last=Ross | first=Stewart Halsey | title=Strategic Bombing by the United States in World War II | publisher=McFarland | publication-place=Jefferson (N. C.) | date=2002-12-27 | isbn=0-7864-1412-X | page=}}</ref>