Varela, Julio, Antonia Padilla, and Carlos Martínez. “MATHEMATICAL ABILlTIES AND KNQWLEDGE IN SIXTH GRADE STUDENTS”. Mexican Journal of Behavior Analysis 1, no. 2 (August 31, 2011): 67–84. Accessed May 18, 2024. https://revistas.unam.mx/index.php/rmac/article/view/27086.