Armstrong, D. M. <br/><br/>
What is a law of nature? 

 - Cambridge  Cambridge University Press  1985 
 - xi,180p. 
<br/><br/><label>ISBN: </label> RS 136.91 
<br/><br/><label>Source: </label> RS 136.91 
<br/><br/><label>Dewey Class. No.: </label>171.2 ARM