TY  - RPRT
TI  - Measurement, or how do we know what we know? Topic one: validity.
AU  - Catherine Greeno
PY  - 2003
DO  - 10.1111/j.1545-5300.2003.00433.x
UR  - https://pubmed.ncbi.nlm.nih.gov/14606205/
ID  - 14606205
ER  -