TY  - RPRT
TI  - Conditional and biconditional rule difficulty under selection and reception conditions.
AU  - C R Sawyer
AU  - P J Johnson
PY  - 1971
DO  - 10.1037/h0031251
UR  - https://pubmed.ncbi.nlm.nih.gov/5567149/
ID  - 5567149
ER  -