Jacobs, J. A.  1916-. <br/><br/>
Reversals of the earth's magnetic field / 
J.A. Jacobs 
 - Bristol :  Hilger,  1984 
 - 230p. ;  26 cm 
<br/><br/><label>ISBN: </label>0852744420 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magnetism, Terrestrial