Establishing the internal and external validity of...

Establishing the internal and external validity of experimental studies

Slack, Marion K., Draugalis, Jolaine R.
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Volume:
58
Journal:
American Journal of Health-System Pharmacy
DOI:
10.1093/ajhp/58.22.2173
Date:
November, 2001
File:
PDF, 99 KB
2001
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