Engel, I.  1933- <br/><br/>
Structural principles / 
I. Engel. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1984. 
 - xvii, 363 p. :  ill. ;  29 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0138540195 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Structures, Theory of.