Ritchie,L.David <br/><br/>
Information / 
Ritchie,L.David. 
 - 1st ed 
 - London:  SaGEnger,  1991. 
 - viii,75p;21cmm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>10577440 
<br/><br/><label>Dewey Class. No.: </label>303.42 RIT