Previt-̌Orton, C. W. 1877-1947.
The shorter Cambridge medieval history in two volumes /
C.W. Previt-̌Orton 
. - Cambridge : University Press,  1960- 
. - 2 v.  22 cm. 
<br/> V. 1. The later Roman empire to the twelfth century  <br/>  V. 2. The twelfth century to the Renaissance. <br/>