Jacobs, John Arthur,  1916- <br/><br/>
Reversals of the Earth's magnetic field / 
J.A. Jacobs. 
 - Bristol :  A. Hilger,  1984. 
 - 230 p. :  ill. ;  24 cm. 
 - 538/.7 .
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0852744420 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomagnetism.
<br/><br/><label>Dewey Class. No.: </label>538/.7