Flexer, Roberta J. <br/><br/>
Programmed reviews of mathematics  / 
by Roberta J. Flexer and Abr aham S. Flexer 
 - New York :  Harper & Row,  1967 
 - 6v. :  ill.;  14 x21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Programmed instruction
<br/><br/><label>Dewey Class. No.: </label>510.77 FLE