RYDER, John D. <br/><br/>
Networks, lines and fields 

 - 2nd ed. 
 - Englewood  Prentice-Hall Inc.  1955 
 - xi, 593 p. 
<br/><br/><label>ISBN: </label>49213 
<br/><br/><label>Dewey Class. No.: </label>621.384  / RYD