[1]
Barner, D., Athanasopoulou, A., Chu, J., Lewis, M., Marchand, E., Schneider, R. and Frank, M. 2018. A One-Year Classroom-Randomized Trial of Mental Abacus Instruction for First- and Second-Grade Students. Journal of Numerical Cognition. 3, 3 (Jan. 2018), 540-558. DOI:https://doi.org/10.5964/jnc.v3i3.106.