Into the Unknown 

 - New York  Reader's Digest Association  1981 
 - 352 p. 
<br/><br/> Index, Bibliography, Illustrations, Pictures 
<br/><br/><label>ISBN: </label>895770989 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural History<br/>Sciences
<br/><br/><label>Dewey Class. No.: </label>R032  / R.D.