TY  - BOOK
AU  - Sarama, Julie
AU  - Sarama, Julie
TI  - Early childhood mathematics education research: Learning trajectories for young children
SN  - 978-0-8058-6309-3
U1  - 372.7 
PY  - 2009///
CY  - U.K.
PB  - Routledge
ER  -