Roy, A. E. <br/><br/>
Orbital motion 

 - 3rd ed. 
 - England  Adam hilger  1988 
 - xv,532p. 
<br/><br/><label>ISBN: </label>0852742290 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/>Orbital motion
<br/><br/><label>Dewey Class. No.: </label>523  / ROY