Maertens, Norbert. <br/><br/>
Meeting individual needs in elementary mathematics / 
by Norbert Maertens and William Dunlap. 
 - Hinsdale, Ill. :  Dryden Press,  1973. 
 - iv, 98 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0030892082 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary).