TY  - RPRT
TI  - Test differences attributable to age, selection processes, and institutional effects.
AU  - R W BORTNER
PY  - 1962
DO  - 10.1093/geronj/17.1.58
UR  - https://pubmed.ncbi.nlm.nih.gov/13871498/
ID  - 13871498
ER  -