TY  - RPRT
TI  - Theory-testing research: building the science.
AU  - G J Acton
AU  - B L Irvin
AU  - B A Hopkins
PY  - 1991
DO  - 10.1097/00012272-199109000-00007
UR  - https://pubmed.ncbi.nlm.nih.gov/1929236/
ID  - 1929236
ER  -