Skyrms B. Au. <br/><br/>
Causal necessity 

 - London  Yale university press England       1980 
 - 205p  cm. 
<br/><br/><label>Standard No.: </label>19,410 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>Z, M0