The RNA world  the nature modern RNA suggests aprebiotic RNA world 
edited by Raymond F. Gesteland, Thomas R. Cech, John F. Atkins. 
 - 3rd ed.. 
 - New Delhi  I. K. International  2006 
 - xxiii, 768p.: ill.; 22cm. 
<br/><br/><label>ISBN: </label>818823799x. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>RNA metabolism Transfer RNA. 
<br/><br/><label>Dewey Class. No.: </label>574.873283  / R43R