Träff, Ulf. <br/><br/>
Kindergarten domain-specific and domain-general cognitive precursors of hierarchial mathematical development :	  A Longitudinal Study / 
Ulf Träff, Linda Olsson, Kenny Skagelund, and Rickard Östergen 
 - Washington,   American Psychological Association,    January 2020. 
 - volume 112, pages 93-109, illustration. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics. 	<br/>Arithmetic.<br/>Counting.
<br/><br/><label>Dewey Class. No.: </label>DPer 370.15 J826 January - February 2020 v112 no. 1-2