TY  - RPRT
TI  - Performance indicator for subject motivation in respiratory tests.
AU  - A D Cunningham
AU  - N L Gregory
AU  - T H Mcdonald
AU  - A Shaw
PY  - 1979
DO  - 10.1007/bf02440954
UR  - https://pubmed.ncbi.nlm.nih.gov/86662/
ID  - 86662
ER  -