Mehlin, Theodore Grefe,  1906- <br/><br/>
Astronomy and the origin of the earth / 
by Theodore G. Mehlin 
 - Dubuque, Iowa :  Wm. C. Brown Publishers,  1968 
 - 131 p. :  ill. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--Popular works