Bullen , K E   . <br/><br/>
An introduction to the theory of seismology /  
K.E Bullen and Bruce A Bolt. 
 - 4th ed /   . 
 - Cambridge :   Cambridge University Press ,   1985. 
 - xvii,499 p :   ill.,figs.,tables ` ;   23 cm .  
<br/><br/>Includes bibliography and index 
<br/><br/><label>ISBN: </label>0521283892  UKP15.00 
<br/><br/><label>Subjects--Index Terms: </label>SEISMOLOGY  
<br/><br/><label>Dewey Class. No.: </label>551.22  / BUL/I