TY  - CHAP
LA  - eng
PY  - 1986
SN  - 0-87353-226-0
SP  - 103-111
T3  - Estimation and mental computation
TI  - Estimation and children's concept of rational number size
UR  - https://nbn-resolving.org/urn:nbn:de:0070-bipr-18155
Y2  - 2024-11-22T11:25:57
ER  -