School Mathematics Study Group, <br/><br/>
First Course in Algebra,Part 1  Textual Documents 
School Mathematics Study Group 
 - United States of America:  Yale University Press.,  1961. 
 - XVI,269p. 
 - Teacher`s Commentary,11. .
<br/><br/><label>Subjects--Index Terms: </label>Numerals and Variables,Variables,Distributive Property,Properties of Multiplication