Campbell, Russell N. <br/><br/>
Insights into English structure  a programmed course 
[by] Russell N. Campbell [and] Judith W. Lindfors. 
 - Englewood Cliffs, N.J.  Prentice-Hall  [1969] 
 - 180 p.  illus. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Grammar--1950-<br/>English language--Programmed instruction.