TY  - RPRT
TI  - Nutritional supplementation and mental development.
AU  - S Grantham-McGregor
AU  - S Walker
AU  - C Powell
PY  - 1991
DO  - 10.1016/0140-6736(91)91476-b
UR  - https://pubmed.ncbi.nlm.nih.gov/1679888/
ID  - 1679888
ER  -