Heers, Jacques Vaughan, Richard, ed.,series <br/><br/>
Family clans in the middle ages  a study of political and social structure in urban areas 

 - Amsterdam  North-Holland publishing company  1977 
 - 266 p.; 24cm. 
 - Europe in the middle ages selected studies .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cities and towns - Italy - history<br/>Clan solidarity<br/>Clans and clan system - history<br/>Family clans<br/>Family class<br/>Social history - Medieval, 500 - 1500