Valles, Carlos G. <br/><br/>
Mastering sadhana :  on retreat with Anthony De Mello / 
Carlos Valles. 
 - London:  Fount An Imprint of Harper Collins Publishers,  c1988. 
 - 190 p. 
<br/><br/><label>ISBN: </label>0006274420 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spiritual retreats.<br/>Spiritual direction.
<br/><br/><label>Dewey Class. No.: </label>248.4  / VAL