Cook, A. H. <br/><br/>
Gravity and the earth. 

 - London :  Wykeham,  1969. 
 - Wykeham science series for schools and universities .
<br/><br/>Bibliography: p. 92. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gravity.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Earth -- Figure.--Earth -- Figure.