TY  - RPRT
TI  - On relationships between longitudinal characteristics and cross-sectional data.
AU  - J A Menken
AU  - M C Sheps
PY  - 1970
DO  - 10.2105/ajph.60.8.1506
UR  - https://pubmed.ncbi.nlm.nih.gov/5465462/
ID  - 5465462
ER  -