The historians' history of the world in twenty-five volumes, volume 07
CHAPTER VIII. OTTO THE GREAT AND HIS SUCCESSORS
[b] H. GERDES, _op. cit._
[c] FRIEDRICH WILHELM BENJAMIN VON GIESEBRECHT, _op. cit._
[d] W. MENZEL, _op. cit._
[e] L. VON RANKE, _op. cit._
[f] JAMES SIME, article on “Germany” in the Ninth Edition of the _Encyclopædia Britannica_.
[g] R. COMYN, _op. cit._
[h] HENRY HALLAM, _The View of the State of Europe during the Middle Ages_.