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Please describe history threat and sample bias in relation to internal and external validity from the book: Ledford, J.R., & Gast, D.L. (Eds.). (2018). Single
Please describe history threat and sample bias in relation to internal and external validity from the book:
Ledford, J.R., & Gast, D.L. (Eds.). (2018). Single Case Research Methodology: Applications in Special Education and Behavioral Sciences (3rd ed.). Routledge. https://doi.org/10.4324/9781315150666
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