TY  - RPRT
TI  - Covariation within functional response classes: implications for treatment of severe problem behavior.
AU  - J R Sprague
AU  - R H Horner
PY  - 1992
DO  - 10.1901/jaba.1992.25-735
UR  - https://pubmed.ncbi.nlm.nih.gov/1429324/
ID  - 1429324
ER  -