Triolkovsky, Konstantin <br/><br/>
Beyond the planet earth 

 - London  Pergamon Press  1960 
 - vi, 190 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/>Planets
<br/><br/><label>Dewey Class. No.: </label>523.4  / T788b