Kuhnel, Wolfgang <br/><br/>
Differential geometry  : Curves-surfaces-manifolds 
/ by Wolfgang Kuhnel 
 - 2nd ed. 
 - USA:  American Mathematical Society,  1950. 
 - 380p. 
<br/><br/><label>ISBN: </label>0821839888 
<br/><br/><label>Dewey Class. No.: </label>516.36  / KUH/D