Littell, McDougal. <br/><br/>
Gateways to mathematical investigations / 
by McDougal Littell. 
 - Teacher's ed. 
 - Dallas :  McDougal,Littell & Co.,  c1994. 
 - vi, 234 p. 
<br/><br/><label>ISBN: </label>0812384768 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra.<br/>Geometry.
<br/><br/><label>LC Class. No.: </label>QA 154.2  / .G38