Whipple, Fred Lawrence. <br/><br/>
Earth, moon, and planets / 
Fred L. Whipple. 
 - 3rd ed. 
 - Cambridge, Mass. :  Harvard University Press,  1969. 
 - viii, 297 p. :  ill., maps, ports. 
 - The Harvard books on astronomy .
<br/><br/><label>ISBN: </label>0674224000 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Planets.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Earth.<br/>Moon.