The CLOUD of unknowing, and other works 

 - Penguin Books :  Harmonds-worth,  1961 
 - 232p.;  17,5 cm. 
 - Penguin Classics .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Espirituales
<br/><br/><label>Universal Decimal Class. No.: </label>248  "13"