Mitchell, Robert. <br/><br/>
Contemporary's number power 5 :  Graphs, tables, schedules and maps / 
by Robert Mitchell. 
 - Chicago :  Contemporary Books,  c1991. 
 - 167 p. : ;  28 cm. 
<br/><br/><label>ISBN: </label>0809256444 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graphic methods--problems, exercises, etc.<br/>Map reading--Problem, exercises, etc.