Chapman, Sydney,  1888- <br/><br/>
The earth's magentism / 
Sydney Chapman 
 - [2nd ed. 
 - London :  Methuen;  [1951] 
 - 127 p. :  ill. ;  17 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomagnetism.
<br/><br/><label>Dewey Class. No.: </label>538.7