Knowles, David 1896-.
Great historical enterprises: problems in monastic history /
David Knowles 
. - London : Thomas Nelson and Sons Ltd.,  1962 
. - viii, 231 p.  22 cm. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Benedict Saint, Abbot of Monte Cassino  Regula Magistri <br/>Benedict Saint, Abbot of Monte Cassino  Rule