TY  - BOOK
AU  - Träff, Ulf.
AU  - Träff, Ulf.
AU  - Olsson, Linda.
AU  - Skagelund, Kenny.
AU  - Östergen, Rickard .
TI  - Kindergarten domain-specific and domain-general cognitive precursors of hierarchial mathematical development :	: A Longitudinal Study 
U1  - DPer 370.15 J826 January - February 2020 v112 no. 1-2 
PY  - 2020///
CY  - Washington, 
PB  - American Psychological Association,  
KW  - Mathematics. 	
KW  - Arithmetic
KW  - Counting
ER  -