TY  - RPRT
TI  - Multi-level models for longitudinal growth norms.
AU  - H Pan
AU  - H Goldstein
PY  - 1997
DO  - 10.1002/(sici)1097-0258(19971215)16:23<2665::aid-sim711>3.0.co;2-v
UR  - https://pubmed.ncbi.nlm.nih.gov/9421868/
ID  - 9421868
ER  -