TY  - RPRT
TI  - Teaching multiplication facts to students with learning problems.
AU  - J C Mattingly
AU  - D A Bott
PY  - 1990
DO  - 10.1177/001440299005600507
UR  - https://pubmed.ncbi.nlm.nih.gov/2303085/
ID  - 2303085
ER  -