TY  - BOOK
AU  - Clements Douglas H
AU  -  Sarama Julie
TI  - Learning and teaching early math: The learning trajectories approach
T2  - Studies in Mathematical Thinking and Learning
SN  - 978-0-367-52197-4
PY  - 2021///
CY  - London, UK
PB  - Routledge 
ER  -