D. P. R. K. Pyongyang <br/><br/>
On The Kyungrak System. 

 - Korea:  Foreign Languages Publishing House,   1964. 
 - 46 p.  ill  21 cm. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medicine and health  
<br/><br/><label>Dewey Class. No.: </label>610.6  / Poy