TY  - RPRT
TI  - Switching requirements in a Head Start classroom.
AU  - J M Jacobson
AU  - D Bushell
AU  - T Risley
PY  - 1969
DO  - 10.1901/jaba.1969.2-43
UR  - https://pubmed.ncbi.nlm.nih.gov/16795201/
ID  - 16795201
ER  -