TY  - RPRT
TI  - VARIATIONS AND ABNORMALITIES OF MOTOR DEVELOPMENT.
AU  - T E TWITCHELL
PY  - 1965
DO  - 10.1093/ptj/45.5.424
UR  - https://pubmed.ncbi.nlm.nih.gov/14330878/
ID  - 14330878
ER  -