Wai Lan Chan, Winnie. <br/><br/>
Subtypes of mathematical difficulties and their stability / 
Winnie Wai Lan Chan and Terry Tin-Yau Wong. 
 - Washington ;  American Psychological Association ,   April 2020. 
 - Volume 112, pages 649-666 :  illustration ;  28 cm. 
<br/><br/> Journal of Educational Psychology, vol. 112, no. 3, pages 649-666, April 2020. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics. 
<br/><br/><label>Dewey Class. No.: </label>DPer 370.15 J826 April-May 2020 v. 112 n. 3-4