The search for extraterrestrial intelligence / 
Prepared by national aeronautics and space administration ; edited by philip Morrison, John billinghan and John Wolfe 
 - 176 páginas 
<br/><br/><label>ISBN: </label>0486238903 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vida en otros planetas<br/>Comunicación interestelar
<br/><br/><label>LC Class. No.: </label>QB54  / E85