Ablon, Leon. <br/><br/>
Linear equations and lines :  steps in mathematics / 
by Leon Ablon, Sherry Blackman and Helen Siner. 
 - California :  Key Curriculum Press,  1989. 
 - xii, 146p. :  illus. ;  22.5cm. 
 -  module 3 .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0-913684-27-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra.
<br/><br/><label>LC Class. No.: </label>QA 211   / S73 1989