Folz, Robert. <br/><br/>
The concept of empire in Western Europe from the fifth to the fourteenth century ... / 
trans. by Sheila Ann Ogelvie. 
 - [London] :  E. Arnold,  [1969] 
<br/><br/>Bibliography: p. 225-232. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Imperialism.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Holy Roman Empire -- History -- To 1517.--Holy Roman Empire -- History -- To 1517.--Holy Roman Empire -- History -- To 1517.