Writings from the Philokalia on prayer of the heart : 
Translated  by E. Kadloubovsky and G.E.H. Palmer. 
 - London :  Faber and Faber,  1951. 
 - 420 p . 
<br/><br/><label>ISBN: </label>0571070620 
<br/><br/><label>Dewey Class. No.: </label>248  / KAD