Porteous, I R <br/><br/>
Geometric differentiation for the intelligence of curves andsurfaces   
by I R Porteous 
 - Cambridge  Cambridge University Press  1994 
 - xiii, 301p. 
<br/><br/><label>ISBN: </label>052139063X 
<br/><br/><label>Dewey Class. No.: </label>516.36  / N944