Duncan, Ernest R.  <br/><br/>
Houghton Mifflin Mathematics / 
Ernest R. Duncan.....(et al.). 
 - Teacher's Edition. 
 - Atlanta :  Houghton Mifflin Company,  c1991. 
 - 476 p. :  ill. ;  29 cm. 
<br/><br/><label>ISBN: </label>0395527783 
<br/><br/><label>Dewey Class. No.: </label>510  / DUN