TY  - RPRT
TI  - Representation and reasoning in early numerical development: counting, conservation, and comparisons between sets.
AU  - C Sophian
PY  - 1995
DO  - 10.1111/j.1467-8624.1995.tb00890.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7750384/
ID  - 7750384
ER  -