Opik, Ernst J <br/><br/>
Interplanetary encounters  close-range gravitational interactions 
Ernst J Opik                                               
 - Amsterdam  Elsevier  1976 
 - 155p. 
<br/><br/><label>ISBN: </label>0-444-41371-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and astrophysics thesaurus<br/>Gravitational interactions<br/>Interplanetary matter
<br/><br/><label>Universal Decimal Class. No.: </label>523.6  / OPI