Hoff, Darrel B. <br/><br/>
Activities in astronomy / 
Darrel B. Hoff, Linda J. Kelsey, John S. Neff. 
 - 3rd ed. 
 - Dubuque, IA :  Kendall / Hunt Pub,  c1992. 
 - ix, 175 p. : ill. 
<br/><br/> Includes appendices 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--Study and teaching