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Johansone, I. (2017). Survey operations procedures in PIRLS 2016. In M. O. Martin, I. V. S. Mullis, & M. Hooper (Eds.), Methods and Procedures in PIRLS 2016 (pp. 6.1-6.26). Retrieved from Boston College, TIMSS & PIRLS International Study Center website: https://timssandpirls.bc.edu/publications/pirls/2016-methods/chapter-6.html
Michael O. Martin, Ina V.S. Mullis, and Martin Hooper, Editors
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