TY  - RPRT
TI  - Validation of a classroom observation code for hyperactive children.
AU  - H Abikoff
AU  - R Gittelmann-Klein
AU  - D F Klein
PY  - 1977
DO  - 10.1037//0022-006x.45.5.772
UR  - https://pubmed.ncbi.nlm.nih.gov/903441/
ID  - 903441
ER  -