TY  - RPRT
TI  - Secular trends in different racial groups.
AU  - C L Lavelle
PY  - 1972
DO  - 10.1043/0003-3219(1972)042<0019:stidrg>2.0.co;2
UR  - https://pubmed.ncbi.nlm.nih.gov/4500560/
ID  - 4500560
ER  -