TY  - BOOK
AU  - Carr, Martha.
AU  - Carr, Martha.
AU  - Alexeev, Natalia.
AU  - Barned, Nicole.
AU  - Wang, Lu.
AU  - Otumfour, Beryl.
TI  - A longitudinal study of spatial skills and number sense development in elementary school children
U1  - DPer 370.15 J826 January - February 2020 v112 no. 1-2 
PY  - 2020///
CY  - Washington, 
PB  - American Psychological Association,  
KW  - Mathematics.
KW  - Numbers.	
KW  - Verbal learning
ER  -