Clements Douglas H. <br/><br/>
Investigations in Number, Data and Space 
Douglas H. Clements 
 - New York  Dale Seymour Pub  1998 
 - 172p.:  ill.;  28cm 
<br/><br/><label>ISBN: </label>1572327014 
<br/><br/><label>Dewey Class. No.: </label>372.7/  / CLE