Herrera, Ismael <br/><br/>
Boundary Methods  An algebraic Theory 
Ismael Herrera 
 - Boston:  Pitman Advanced Publishing Program,  1984. 
 - viii, 136p. 
<br/><br/><label>ISBN: </label>0273086359 
<br/><br/><label>Dewey Class. No.: </label>515.35  / HER/B