Alwin, Robert H. <br/><br/>
Algebra--programmed / 
Robert H. Alwin, Robert D. Hackworth. 
 - 2nd ed. 
 - Englewood Cliffs, N.J :  Prentice-Hall,  1978-1980. 
 - 2 v. :  ill. 
<br/><br/> Part 1 & 2 by R.H. Alwin, R.D. Hackworth & [J.W. Howland]. 
<br/><br/><label>ISBN: </label>0130220205 pbk. (v.2) 0130220388 pbk. (v.1) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra--Programmed instruction.