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The control of non-treatment variables: necessity or illusion?
- Publication Year :
- 1983
- Publisher :
- Hans Huber Publishers, 1983.
- Subjects :
- nutritional education
Methodology
research design
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.od.......202..baf64c177004f924709a9805284be46e