Havel, Václav. <br/><br/>
The increased difficulty of concentration; 
translated from the Czech by Vera Blackwell. 
 - London,  Cape,  1972. 
 - 78 p.  19 cm. 
 - Cape editions, 49 .
<br/><br/> Translation of Ztížená možnost soustředění.  Play. 
<br/><br/>Bibliography: p. 76. 
<br/><br/><label>ISBN: </label>0224618601  022461861X (pbk.) 
<br/><br/><label>LCCN: </label>72189389  
<br/><br/><label>Nat. Bib. No.: </label>B72-04697 
<br/><br/><label>Subjects--Index Terms: </label>Lasky collection 
<br/><br/><label>LC Class. No.: </label>PG5039.18.A9  / Z4513 
<br/><br/><label>Dewey Class. No.: </label>891.8/6/25