TY  - RPRT
TI  - Letter: Lead and intelligence.
AU  - D Bryce-Smith
AU  - S Smith
AU  - H A Waldron
PY  - 1974
DO  - 10.1136/bmj.4.5937.165-c
UR  - https://pubmed.ncbi.nlm.nih.gov/4370949/
ID  - 4370949
ER  -