Skinner, Burrhus Frederick  <br/><br/>
Walden dos 

 - 1 ed. 
 - Barcelona :   Orbis,   1985 
 - 354 [355] p ;   20 cm 
<br/><br/><label>ISBN: </label>8476342845 
<br/><br/><label>Subjects--Topical Terms: </label><br/>filosofía
<br/><br/><label>Dewey Class. No.: </label>105.0000 H62h