TY  - GEN
AU  - Steckler,Allan
AU  - McLeroy,Kenneth R
TI  - The importance of external validity
SN  - 1541-0048
PY  - 2008///0117
KW  - Periodicals as Topic
KW  - standards
KW  - Public Health
KW  - Research
KW  - Validation Studies as Topic
N1  - Publication Type: Editorial
UR  - https://doi.org/10.2105/AJPH.2007.126847
ER  -