TY  - RPRT
TI  - Birth cohort analysis using irregular cross-sectional data: a technical note.
AU  - E Schifflers
AU  - M Smans
AU  - C S Muir
DO  - 10.1002/sim.4780040110
UR  - https://pubmed.ncbi.nlm.nih.gov/3873104/
ID  - 3873104
ER  -