The Drake equation  estimating the prevalence of extraterrestrial life through the ages 
edited by Douglas A. Vakoch and Matthew F. Dowd  
 - Cambridge  Cambridge University Press  2015 
 - xxii, 319p. 
<br/><br/><label>ISBN: </label>978-1-107-07365-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Extraterrestrial beings<br/>Life on other planets<br/>Science - Life sciences - evolution
<br/><br/><label>Universal Decimal Class. No.: </label>52-37  / THE