Spear, Mary Eleanor. <br/><br/>
Practical charting techniques. 

 - New York  McGraw-Hill  [1969] 
 - xxii, 394 p.  illus., maps.  23 cm. 
<br/><br/> 920316 
<br/><br/>Bibliography: p. 369-371. 
<br/><br/><label>LCCN: </label>69014491  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics--Graphic methods.
<br/><br/><label>LC Class. No.: </label>HA31  / .S67 
<br/><br/><label>Dewey Class. No.: </label>311/.26