Chapman, Sydney,  1888- <br/><br/>
The earth's magentism / 
Sydney Chapman 
 - [2nd ed., rev. and reset 
 - New York :  John Wiley;  [1951] 
 - 127 p. :  ill. ;  17 cm. 
 - Methuen's monographs of physical subjects .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magnetism, Terrestrial
<br/><br/><label>Dewey Class. No.: </label>538.7