Rieker, Hans-Ulrich,  1920- <br/><br/>
The secret of meditation / 
Hans-Ulrich Rieker ; translated from the German by A. J. Pomerans 
 - London :  Rider,  1955 
 - 176 p. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Topography--History<br/>Geography
<br/><br/><label>Dewey Class. No.: </label>160