Stetson, Harlan T.  (1885-1964). <br/><br/>
Sunspots in action / 
by Harlan True Stetson ; with a foreword by Edward V. Appleton. 
 - New York :  The Ronald Press Company,  copyright 1947. 
 - XIV, 252 strony :  ilustracje ;  22 cm. 
 - Humanizing Science Series .
 - Humanizing Science Series .
<br/><br/>Bibliografia na stronach 231-237. Indeksy.