Part 11 / Book 2 — Chapter VIII. Otto the Great and his Successors
Reading edition
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.