TY  - RPRT
TI  - Causality in speech pathology.
AU  - W H Perkins
AU  - R F Curlee
PY  - 1969
DO  - 10.1044/jshd.3403.231
UR  - https://pubmed.ncbi.nlm.nih.gov/5821125/
ID  - 5821125
ER  -