Havel, Vâaclav. <br/><br/>
The increased difficulty of concentration  [[Book] /] 
translated from the Czech by Vera Blackwell. 
 - London :  Cape,  1972. 
 - 78 p. ;  19 cm. 
 - Cape editions, 49 .
<br/><br/> Translation of Ztâiézenâa moéznost soustéredéenâi.  Play. 
<br/><br/>Bibliography: p. 76. 
<br/><br/><label>ISBN: </label>0224618601 022461861X (pbk.) : 022461861X (pbk.) 022461861X (pbk) 9780224618601 9780224618618 (pbk.) 
<br/><br/><label>LCCN: </label>72189389 //r83 
<br/><br/><label>LC Class. No.: </label>PG5039.18.A9  / Z4513 
<br/><br/><label>Dewey Class. No.: </label>891.8625 891.8625 891.8625 
<br/><br/><label>National Library of Medicine Call No.: </label> / H I