Zwiebach, Barton.  <br/><br/>
First Course in String Theory 

 - 2/e 
 - New Delhi  Cambridge University Press  2009 
 - xxii,672p. 
<br/><br/><label>ISBN: </label>9780521176330 
<br/><br/><label>Subjects--Topical Terms: </label><br/>String Models
<br/><br/><label>Dewey Class. No.: </label>530.14  / Zwi