School mathematics study group :  Studies in mathemstics,  v.8 / 
prepared under the supervision of an Editorial Committee consisting of Donald R. Clarkson... [et al.]. 
 - US :  Yale University,  1961. 
 - 465 p. :  ill. 
 - School mathematics study group. .
<br/><br/>v.7 Intuitive geometry --- v.8 Concepts of algebra. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Secondary).<br/>Algebra.